734 Transactions of tee American Institute. 



Exliibition to be one of thq most important discoveries made in 

 technical chemistry since the London Exhibition of 1862. 



NEW GAS STOVE. 

 Mr. Lazear exhibited a dome gas stove, which diflfered from other 

 stoves of this character, inasmuch as the perforated plate is so 

 situated that it cannot be obstructed by dirt or injured by accident, 

 and so arranged as to make the dome-burner self-cleanin£c. An air 

 tube through the center of the burner serves to permit any foreign 

 substance to drop through and not obstruct comliustion, and an 

 upward current of air secures a strong and steady flame, unaccom- 

 panied with odor or smoke. 



NEW STEAM GAUGE. 

 Mr. Botticher exhibited his patent adjustable pressure and vacuum 

 gauge, and explained its construction. An adjusting screw seemed 

 to be its chief improvement. As it was a mercurial gauge, some 

 objections were raised by the members to the employment of 

 gauges of this class. Mr. Fisher remarked that he had at one time 

 held a gauge of this class in his hand, and in a few moments it 

 indicated three pounds pressure, and this from the heat of his hand 

 alone. It was claimed by the inventor that the objections to mer- 

 curial gauges are entirely removed in his adaptation. 



THE HINKLEY KNITTING MACHINE. 

 Mr. G. E. Harding, of 726 Broadway, New York city, exhibited 

 the new Hinkley knitting machine, and stated that at first, like the 

 sewing machine, the knitting machine was introduced only into 

 manufactories, but is now considered as essential in a family as the 

 former. While other machines knit with from seventy-five to one 

 hundred and fifty needles, this machine uses but one needle, which 

 is threaded similar to a sewing machine needle, and is as easily 

 managed. In fact, a child of twelve yeaes of age can run it. It 

 operates by hand or foot, like a sewing mtichine, knits hosiery with 

 the heel and toe complete, will knit flat work of all descriptions, 

 and can be operated at the rate of two thousand stitches per minute.. 

 Although a new candidate for favor, the machine has received one 

 of the highest premiums at the late American Institute Fair; and, 

 one of the advantages claimed for it, in addition to its simplicity,; 

 is that it cannot be rendered valueless for a time, as other machines 

 of this character often are, by the breakage of a number of delicate 

 needles. 



