Scientific Glass Apparatus

These dimensions were taken from U.S. A. sources cf. Scientific Glass Apparatus Catalogue, J—52 of 1952. 

Marketed by Baird and Tatlock (London) Ltd. t Marketed by the Scientific Glass Apparatus Company. 

The glass helices may be purchased from the Scientific Glass Apparatus Company, Bloomfield, N. J., or the American Instrument Company, Silver Spring, Md. Wire helices are readily made from No. 18 B. and S. gauge copper or Nichrome wire, by simultaneously winding two strands side by side on a j-in. steel mandrel. The spirals are cut into single helices by means of a thin emery wheel and then removed from the mandrel. 

Dilute the TNT and wax filtrate obtd in 4.4.3.3.1 to 100ml with benzene satd with RDX. Transfer a 10-ml aliquot of the TNT soln which contns 35—40mg of TNT to a 300-ml reduction flask (Scientific Glass Apparatus Co JD2776 or equivalent is satisfactory). Evaporate the benzene to dryness with a slow stream of dry air (connect a drying tube between wir supply and inlet tube of flask). 

A distilling head such as J-1104 obtained from Scientific Glass Apparatus Company, Bloomfield, New Jersey, was used. 

SGACI Scientific Glass Apparatus SI specific impulse... 

Supplied, for example, by the Scientific Glass Apparatus Co. and by Midland Silicones Ltd. 

Catalogue GG 5-38, size 34/45, made by the Scientific Glass Apparatus Company, Bloomfield, N. J. These connections have been found to lose only a few millimeters of vacuum per hour when used without lubricant. 

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