444 ANNUAL RECORD OF SCIENCE AND INDUSTRY. 



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therrnore, the flame is absolutely steady, and there is no dan- 

 ger of its sudden extinction, as with magnesium ; and the 

 eye can sustain its brilliance without being affected. Its 

 cost is much less than that of either of the other lights. 1 

 Z>, Dec, 1874, 381. 



NITRIC OXIDE-BISULPHIDE OF CARBON LAMr FOR PHOTO- 

 GRAPHIC USE. 



A lamp of the following construction, patented by Sell, in 

 England, is said to afford a light very rich in the highly re- 

 frangible rays. Photographs have been taken by means of 

 it, with a comparatively short exposure, which are said to 

 be all that can be desired as to the distribution of lijjht and 

 shade. A small spherical glass vessel, filled with bisulphide 

 of carbon, is supplied with a wick, by which it is fed to an 

 ordinary Wild and Wessel burner, through the centre of 

 which nitric oxide is admitted from a gasometer by means 

 of a tube bent at right angles. This globe is inclosed in a 

 larger one of glass, filled with cold water, to cool the bisul- 

 phide. Upon lighting the bisulphide, which can be done 

 without danger, and then regulating the flow of nitric oxide 

 and the height of the wick, a beautiful white light of great 

 intensity may be produced. 14 C, CCXV., 1875, 384. 



meeriman's water-proof life-saving dress. 



The following description is given of this invention, the 

 useful character of which has been so admirably tested by 

 Captain Boynton in his recent trial trips in the English Chan- 

 nel. The dress is composed of two principal parts : the up- 

 per portion consists of the shirt or jacket, a headpiece, sleeves 

 and gloves, all in one piece, and made of rubber cloth or other 

 water-proof materials. The lower portion is composed of 

 pantaloons and boots of similar material, and also in one 

 piece. The front of the head-piece, corresponding with the 

 face of the wearer, is made highly elastic, and is provided 

 with an aperture of suitable size to expose the eyes, nose, 

 and mouth. The top, back, and sides of the head-piece are 

 made double, forming a cavity for the purpose of admitting 

 of expansion by inflation. The effect of this inflation is not 

 only to support the head when in the water, but also to draw 

 the elastic edges of the aperture tight about the face, thus 



