the various Kinds of Air. 445 



EXP. W.'T-Pho'phoratcd Oxygeiie Gas becmics luminous by the Contact of the Oxygenated 

 JWuriatic Acid Gas. 

 AFTER having left a cylinder of phofphorus for one minute in feveral cubit inches of 

 pureoxygene gas, in which it did not fliine at all, nor afFedl the tranfparency by white va- 

 pours when brought into the light ; a bubble of oxygenated muriatic acid gas, obtained by 

 diftillaticn of the ordinary muriatic acid from the black oxide of manganefe, was introduced. 

 The mixture of the two gafes produced a foft light through the whole niafs of elatlic fluid 

 contained in the velTel. 



EXP. III. PhofphoratedOxygcne is aljo luminous luith Nitrous Gas. 



NITROUS gas is very greedy of oxygene, in order to convert itfelf into nitrous acid. The 

 nitric acid fuddenly takes this gas from the oxygene gas, while he.it is developed, and the 

 combination is (hewn in red vapours. I was defirous of afcertaining what would happen 

 when nitrous gas was introduced into phofphorated oxygene gas, according to the ufual 

 procefs. As I performed my experiment in the dark, I could not obftrve the moment in 

 which the nitrous gas arrived at the upper part of the jar in"conta£l: with the phofphcrated 

 gas. A very perceptible azure light was feen, which was more confiderable than had been 

 afforded by the ufe of any other kind of gas. A fecond introduftion of nitrous gas produced 

 n6 further effedl. The veflel being afterwarils infpefted by the light of a candle, the mixture 

 of the two gafes appeared fo opake, and t}:e glafs fo loaded with white vapours, that it ap- 

 peared as if filled with milk. 



E^P. IV. — Phofphorus isfoluble in Hydrogene Gas. 



INFLAMMABLE gas difTolves phofphorus as fpeedily as oxygene gas in the firfl; Experi- 

 ment, and the whole volume of this gas is impregnated and becomes phofpliorefcent by the 

 contafl of oxygene gas, or the oxygenated muriatic acid gas. But, in order to obferve this phe- 

 nomenon in perfection, it is neceflary to operate with pure inflammable gas, which has not 

 long been in contadl with water, becaufe this would prevent its a£ling upon the phofphorus 

 with the fame energy ; and as this gas abforbs a certain portion of pure air from the water, it 

 would follow that the phofphorus would produce more or lefs of white vapour, and readily 

 emit light. It is therefore necefTary to operate over mercury. 



EXP. V. VI. and VII. — The Appearances of Phofphorus in the Oxygenated Muriatic Aid Gas. 

 A PIECE of phofphorus was introduced into a cylinder of glafs filled with oxygenated 

 muriatic acid gas over water. It did not burn perceptibly in the dark ; but in the light, 

 white vapours were feen through the whole of the glafs in fuch plenty as to render it opake. 

 A fhort time afterwards the phofphorus was fufed and ran like wax by heat, or camphor 

 by- the nitric acid. The phofphorus in this flate floated on the water, inllead of falling to 

 the bottom as before its fufion. The temperature of the atmofpherc at the time of making 

 this experiment, was about ten degrees a6ovc o. I put a large cylindrical piece of phofpho- 

 ru-s into a cryflal decanter, placed on a tabic, and full of very pure oxygenated muriatic acid 

 ga9. The capacity of the bottle was eight cubic inches, and it was entirely full. The phof- 

 phorus took fire with flame, and threw out a great number of very brilliant fparks againfl 

 the fides of the vcfTcl, which it heated, and ilfclf became entirely fiifcd. The vefll'I wag- 



iillcd 



