Dear Sir:—Permit me briefly to call attention to a few points in the preparation of gas for Bergeon's treatment. After trying several methods I have, by travelling in a circle, again reached and for the present settled upon, marble chips and H2SO4 for generating the CO2.
The objection which Dr. Babcock' makes regarding the irritating properties of the gas made from mineral acids is, in my practice, entirely avoided. A gas which made his "nostrils sting" was clearly unfit for use whether there were enteric ulcerations or not. I have discarded HCI. and use only H2SO4 (C.P.) because the by-products, (such as free chlorine gas) are much harder to get rid of with the former. I use a large mouthed half-gallon generating bottle, in which the marble chips (not dust) are placed. This is connected with the first wash bottle, (of which
MCCASKEY GW. BERGEON'S METHOD. JAMA. 1887;IX(1):28–29. doi:10.1001/jama.1887.04360030027009
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