Sir Humphry Davy: Pioneer Chemist and His Invention of the Coal Miner’s “Safe Lamp” at London’s Royal Institution – 1815

humphry-davy-51Among the many examples to be cited of science serving the cause of humanity, one story stands out as exemplary. That narrative profiles a young, pioneering “professional” chemist and his invention which saved the lives of thousands of coal miners while enabling the industrial revolution in nineteenth-century England. The young man was Humphry Davy, who quickly rose to become the most famous chemist/scientist in all of England and Europe by the year 1813. His personal history and the effects of his invention on the growth of “professionalism” in science are a fascinating story.

The year was 1799, and a significant event had occurred. The place: London, England. The setting: The dawning of the industrial revolution, shortly to engulf England and most of Europe. The significant event of which I speak: The chartering of a new, pioneering entity located in the fashionable Mayfair district of London. In 1800, the Royal Institution of Great Britain began operation in a large building at 21 Albemarle Street. Its pioneering mission: To further the cause of scientific research/discovery, particularly as it serves commerce and humanity.


The original staff of the Royal Institution was tiny, headed by its founder, the notable scientist and bon-vivant, Benjamin Thompson, also known as Count Rumford. Quickly, by 1802, a few key members of the founding staff, including Rumford, were gone and the fledgling organization found itself in dis-array and close to closing its doors. Just one year earlier, in 1801, two staff additions had materialized, men who were destined to make their scientific marks in physics and chemistry while righting the floundering ship of the R.I. by virtue of their brilliance – Thomas Young and the object of this post, a young, relatively unknown, pioneering chemist from Penzance/Cornwall, Humphry Davy.

By the year 1800, the industrial revolution was gaining momentum in England and Europe. Science and commerce had already begun to harness the forces of nature required to drive industrial progress rapidly forward. James Watt had invented the steam engine whose motive horsepower was now bridled and serving the cause by the year 1800. The looming industrial electrical age was to dawn two decades later, spearheaded by Michael Faraday, the most illustrious staff member of the Royal Institution, ever, and one of the greatest physicists in the history of science.

In the most unlikely of scenarios at the Royal Institution, Humphry Davy interviewed and hired the very young Faraday as a lab assistant (essentially lab “gofer”) in 1813. By that time, Davy’s star had risen as the premier chemist in England and Europe; little did he know that the young Faraday, who had less than a grade-school education and who worked previously as a bookbinder, would, in twenty short years, ascend to the pinnacle of physics and chemistry and proceed to father the industrial electrical age. The brightness of Faraday’s scientific star soon eclipsed even that of Davy’s, his illustrious benefactor and supervisor.

For more on that story click on this link to my previous post on Michael Faraday:

Wanted: Ever More Coal from England’s Mines 
at the Expense of Thousands Lost in Mine Explosions

Within two short years of obtaining his position at the Royal Institution in 1813, young Faraday found himself working with his idol/mentor Davy on an urgent research project – a chemical examination of the properties of methane gas, or “fire damp,” as it was known by the “colliers,” or coal miners.

The need for increasing amounts of coal to fuel the burgeoning boilers and machinery of the industrial revolution had forced miners deeper and deeper underground in search of rich coal veins. Along with the coal they sought far below the surface, the miners encountered larger pockets of methane gas which, when exposed to the open flame of their miner’s lamp, resulted in a growing series of larger and more deadly mine explosions. The situation escalated to a national crisis in England and resulted in numerous appeals for help from the colliers and from national figures.

By 1815, Humphry Davy at the Royal Institution had received several petitions for help, one of which came from a Reverend Dr. Gray from Sunderland, England, who served as a spokesman/activist for the colliers of that region.

Davy and the Miner’s Safe Lamp:
Science Serving the “Cause of Humanity”

Working feverishly from August and into October, 1815, Davy and Faraday produced what was to become known as the “miner’s safe lamp,” an open flame lamp designed not to explode the pockets of methane gas found deep underground. The first announcement of Davy’s progress and success in his work came in this historic letter to the Reverend Gray dated October 30, 1815.


The announcement heralds one of the earliest, concrete examples of chemistry (and science) put to work to provide a better life for humanity.

Royal Institution
Albermarle St.
Oct 30

 My Dear Sir

                               As it was in consequence of your invitation that I endeavored to investigate the nature of the fire damp I owe to you the first notice of the progress of my experiments.

 My results have been successful far beyond my expectations. I shall inclose a little sketch of my views on the subject & I hope in a few days to be able to send a paper with the apparatus for the Committee.

 I trust the safe lamp will answer all the objects of the collier.

 I consider this at present as a private communication. I wish you to examine the lamps I had constructed before you give any account of my labours to the committee. I have never received so much pleasure from the results of my chemical labours, for I trust the cause of humanity will gain something by it. I beg of you to present my best respects to Mrs. Gray & to remember me to your son.

 I am my dear Sir with many thanks for your hospitality & kindness when I was at Sunderland.


                                                                             H. Davy

This letter is clearly Davy’s initial announcement of a scientifically-based invention which ultimately had a pronounced real and symbolic effect on the nascent idea of “better living through chemistry” – a phrase I recall from early television ads run by a large industrial company like Dupont or Monsanto.


In 1818, Davy published his book on the urgent, but thorough scientific researches he and Faraday conducted in 1815 on the nature of the fire damp (methane gas) and its flammability.


Davy’s coal miner’s safety lamp was the subject of papers presented by Davy before the Royal Society of London in 1816. The Royal Society was, for centuries since its founding by King Charles II in 1662, the foremost scientific body in the world. Sir Isaac Newton, the greatest scientific mind in history, presided as its president from 1703 until his death in 1727. The Society’s presence and considerable influence is still felt today, long afterward.

davy41Davy’s safe lamp had an immediate effect on mine explosions and miner safety, although there were problems which required refinements to the design. The first models featured a wire gauze cylinder surrounding the flame chamber which affected the temperature of the air/methane mixture in the vicinity of the flame. This approach took advantage of the flammability characteristics of methane gas which had been studied so carefully by Davy and his recently hired assistant, Michael Faraday. Ultimately, the principles of the Davy lamp were refined sufficiently to allow the deep-shaft mining of coal to continue in relative safety, literally fueling the industrial revolution.

Humphry Davy was a most unusual individual, as much poet and philosopher in addition to his considerable talents as a scientist. He was close friends with and a kindred spirit to the poets Coleridge, Southey, and Wordsworth. He relished rhetorical flourish and exhibited a personal idealism in his earlier years, a trait on open display in the letter to the Reverend Gray, shown above, regarding his initial success with the miner’s safe lamp.

“I have never received so much pleasure from the results of my chemical labours, for I trust the cause of humanity will gain something by it.”

As proof of the sincerity of this sentiment, Davy refused to patent his valuable contribution to the safety of thousands of coal miners!

Davy has many scientific “firsts” to his credit:

-Experimented with the physiological effects of the gas nitrous oxide (commonly known as “laughing gas”) and first proposed it as a possible medical/dental anesthetic – which it indeed became years later, in 1829.

-Pioneered the new science of electrochemistry using the largest voltaic pile (battery) in the world, constructed for Davy in the basement of the R.I. Alessandro Volta first demonstrated the principles of the electric pile in 1800, and within two years, Davy was using his pile to perfect electrolysis techniques for separating and identifying “new” fundamental elements from common chemical compounds.

-Separated/identified the elements potassium and sodium in 1807, soon followed by others such as calcium and magnesium.

-In his famous, award-winning Bakerian Lecture of 1806, On Some Chemical Agencies of Electricity, Davy shed light on the entire question concerning the constituents of matter and their chemical properties.

-Demonstrated the “first electric light” in the form of an electric arc-lamp which gave off brilliant light.

-Wrote several books including Elements of Chemical Philosophy in 1812.

In addition to his pioneering scientific work, Davy’s heritage still resonates today for other, more general reasons:

-He pioneered the notion of “professional scientist,” working, as he did, as paid staff in one of the world’s first organized/chartered bodies for the promulgation of science and technology, the Royal Institution of Great Britain.

-As previously noted, Davy is properly regarded as the savior of the Royal Institution. Without him, its doors surely would have closed after only two years. His public lectures in the Institution’s lecture theatre quickly became THE rage of established society in and around London. Davy’s charismatic and informative presentations brought the excitement of the “new sciences” like chemistry and electricity front and center to both ladies and gentlemen. Ladies were notably and fashionably present at his lectures, swept up by Davy’s personal charisma and seduced by the thrill of their newly acquired knowledge… and enlightenment!


The famous 1802 engraving/cartoon by satirist/cartoonist James Gillray
Scientific Researches!….New Discoveries on Pneumaticks!…or…An
Experimental Lecture on the Power of Air!

This very famous hand-colored engraving from 1802 satirically portrays an early public demonstration in the lecture hall of the Royal Institution of the powers of the gas, nitrous oxide (laughing gas). Humphry Davy is shown manning the gas-filled bellows! Note the well-heeled gentry in the audience including many ladies of London. Davy’s scientific reputation led to his eventual English title of Baronet and the honor of Knighthood, thus making him Sir Humphry Davy.

The lecture tradition at the R.I. was begun by Davy in 1801 and continued on for many years thereafter by the young, uneducated man hired by Davy himself in 1813 as lab assistant. Michael Faraday was to become, in only eight short years, the long-tenured shining star of the Royal Institution and a physicist whose contributions to science surpassed those of Davy and were but one rank below the legacies of Galileo, Newton, Einstein, and Maxwell. Faraday’s lectures at the R.I. were brilliantly conceived and presented – a must for young scientific minds, both professional and public – and the Royal Institution in London remained a focal point of science for more than three decades under Faraday’s reign, there.


The charter and by-laws of the R.I. published in 1800 and an admission ticket to Michael Faraday’s R.I. lecture on electricity written and signed by him: “Miss Miles or a friend / May 1833”

Although once again facing economic hard times, the Royal Institution exists today – in the same original quarters at 21 Albemarle Street. Its fabulous legacy of promulgating science for over 217 years would not exist were it not for Humphry Davy and Michael Faraday. It was Davy himself who ultimately offered that the greatest of all his discoveries was …Michael Faraday.