214 



THE INDIA RUBBER WORLD 



[April i, 1907. 



treads alone the outfit is r.ot complete. These are supplemented 

 by the metallic nosings which cover the treads at the edge of the 

 stairs. Tliese come in all sizes and in various designs, including 

 the plain, corrugated, half corrugated, diamond pattern, and so 

 on, and are made in brass and zinc. [Painesville Metallic Binding 

 Co., Painesville, Ohio.] 



THERMOSCOPIC HEATER, FOR DENTISTS. 



The Thcrmoscopic heater which is an invention of Dr. How, 

 is an appliance for the proper heating of gutta-percha, which 



should be heated to just its softening point, 

 anil it provides just as well for low heat 

 as for high heat varieties. The idea in 

 its construction is that the gutta-percha 

 shall be heated gradually and thoroughly 

 without scorching, and that the operation shall have a correct 

 gage as to the degree of heal used. It is made of steatite or soap- 

 stone, with a wooden handle. A metal button in the steatite, 

 which melts at 212° F., shows the softening temperature of low 

 heat gutta-percha. For high heat gutta-perchas this is poured 

 out and substituted by a second button which melts at 230° F. 

 This IS one of the many devices that have gone to facilitate and 

 make easy the practice of dentistry and many members of the 

 profession have found this simple little heater almost in- 

 dispensable in their work. [The S. S. White Dental Manufac- 

 turing Co., Philadelphia] 



SAMPLE CASE OF RUBBER GOODS. 



It is always a great advantage to a prospective buyer in almost 

 any line of goods to be able to procure in advance samples of the 



^^^' 



Mech.\nic.\l Rri!PER Goons S.vmple Case. 



goods which he wishes to purchase. In this connection is illus- 

 trated a sample case for mechanical goods which is both service- 

 able and attractive. It is adapted especially for dififerent kinds of 



packings, belting and hose, which can be arranged in the case 

 so as to be examined conveniently. At the same time they can 

 be packed in little space, which is an added advantage. [The 

 Mechanical Rubber Co. (Chicago Rubber Works). Chicago.] 



RUBBER SUPPOSITORY MOLDS. 



A P.VTENT has been applied for for rubber suppository molds, 

 the general use of which, it is claimed, would be an advantage 

 over the brass molds now in use. Suppositories are made of 

 either cacao butter mass or glycerinated gelatine mass, and are 

 made either by a cold pressure machine or by pouring the melted 

 mass into split brass molds, 'llie pressure machines are expen- 

 sive and do not turn out uniform suppositories, the medicament 

 never being evenly distributed throughout the mass, and they are 

 seldom used except for .special purposes. Both in drugstores and 

 manufactories the brass molds are generally employed for making 

 suppositories, and on account of the machine work required in 



Sri'i'osrn.RY INloi.us. 



finishing the brass mold they are very expensive, ranging any- 

 where from $2.50 to $100, according to size and capacity. An 

 advantage in using rubber is that the rubber mold can be formed 

 from iron patterns in the form of mats and these mats are then 

 cut up so as to divide the mold into three parts, as shown in the 

 illustration. This makes a great saving of expense in producing 

 the article. Another advantage is in the actual working of the 

 rubber mold itself, as it has always been difficult to remove sup- 

 positories from Drass molds on account of the tendency to 

 stick ; in rubber molds the flexibility permits them to be easily 

 ejected. [The Remington Manufacturing Co., Merchant's build- 

 ing, Philadelphia. | 



"GLORIA" COIN MATS. 



Coin mats arc now conceded a necessity on nearly all counters 

 over which change is made. The only question to be met is that 

 of the choice of the best quality and fitness for the especial 

 purpose to which each one is to be devoted. The better the grade 

 of rubber, the better satisfaction is given, is the general con- 

 sensus of opinion, hence those made of pure sponge rubber recom- 

 mend themselves to the trade in a specific way. The mat known 

 as the "Gloria" has this merit and also that of being attractive 

 in appearance and convenient in size. Its measurements are 

 7 inches across, which dinieujions tneet the requirements of the 

 ordinary -.ises to which coin mats are put. Another recommenda- 

 tion for their very general use lies in the fact that they are 

 antiseptic, than which nothing could be of more importance when 

 so much that is undesir?ble is transir.itted by contact. [The 

 Hanover Rubber Co., Hanover-Limmer, Germany. George Borg- 

 feldt & Co., Nos. 48-50 West Fourth street. New York, sole 

 agents for the United States and Canada.] 



Aau Tubing. — The rubber drug known as "Atmoid" has been 

 used with good results in the manufacture of acid tubing. For 

 the tubing of the best quality it is recommended that 5 per cent 

 of Atmoid be the only mineral filling used. For cheaper qualities 

 a further addition of barytes mav be used. 



