. The principles and practice of dental surgery. 768 VULCANIZED RUBBER PROCESS. l>een passed in the attempt to provide the smallest and lightestapparatus possible. Those heaters are best which will hold twoor three pieces, with space aronnd for water, which shouldalwavs cover the flasks. The flasks, which ordinarily are madeentirely too small, should be able to hold the largest cases withease. Fig. 270 represents one of the small vulcanizers of Dr. Hayes,of Bnffalo, which claims to vulcanize one piece in 40 minutes, at 320°, with only one ounce of al-cohol. It is a beautiful specimeno
. The principles and practice of dental surgery. 768 VULCANIZED RUBBER PROCESS. l>een passed in the attempt to provide the smallest and lightestapparatus possible. Those heaters are best which will hold twoor three pieces, with space aronnd for water, which shouldalwavs cover the flasks. The flasks, which ordinarily are madeentirely too small, should be able to hold the largest cases withease. Fig. 270 represents one of the small vulcanizers of Dr. Hayes,of Bnffalo, which claims to vulcanize one piece in 40 minutes, at 320°, with only one ounce of al-cohol. It is a beautiful specimenof ingenuity and workmanship;but I much prefer his three-flaskvulcanizers—run for a longer timeand at a lower temperature. Asto whether one or ten ounces ofalcohol are consumed, is alto-gether unworthy of that unnecessary extrava-gance should be encouraged ; butdental art has suffered much from that spirit of economy inthe Kiboratory which puts 33 per cent, of alloy in gold plate,Fig. 271. deals in cheap teeth, and thinks more of petty savings of materialthan o
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