What technology did John Dalton use to show his atomic theory?
I fear that DrGaello… did not fully read the article to which he alludes. While one might assume that the study of gases lead to the atomic theory, it was actually Dalton’s attempts to improve on the values of the atomic weights of the elements that lead Dalton more directly to the atomic theory. In fact, a unit used for atomic mass is the dalton. 1 dalton is equal to 1 atomic mass unit. 1 dalton = 1.6605402E-27 kg As for technology, there was little in the way of technology in Dalton’s time. He made use of the common laboratory equipment of the day: the balance, various pieces of glassware, and manometers for the measurement of gas pressures.