944 REpoRT OF THE CHEMIST OF THE 
with the two samples examined, it appears to be very variable in 
composition. Paragrene is manufactured by Fred L. Lavanburg, 
165 William St., N. Y. City. 
BLACK DEATH. 
This material is made by the Oatka Chemical Co., Mumford, 
N. Y. The sample examined was obtained at Canandaigua. It 
consists largely of sulphate of lime or gypsum. It contains a very 
small amount of arsenic and some organic matter not determined. 
SLUG SHOT. 
This is manufactured by Benjamin Hammond, Fishkill-on-Hud- 
son, N. Y. The sample examined was secured at Cuba. The 
material is largely sulphate of lime and silica, with small amounts 
of copper and arsenic compounds. 
LONDON PURPLE. 
London purple is a by-product in manufacture of dyes. It is 
very variable in composition. ‘The arsenic is present chiefly as a 
calcium arsenite. The sample examined was found at East Au- 
rora, and came from Hemmingway’s London Purple Co., London 
and New York. It contained 32.88 per ct. arsenious oxide. 
LAUREL GREEN. 
This is made by the Nichols Chemical Co., New York, and 
the sample examined was found at East Aurora. It was found 
to contain 3.83 per ct. arsenious oxide and 11.50 per ct. copper 
oxide with large amounts of calcium carbonate and calcium hy- - 
doxide (slaked lime). 
SMITH’S ELECTRIC VERMIN EXTERMINATOR. 
This is made by Fernando B. Smith, Canton, O. The sample 
was taken at Jamestown. It appears to be mainly a mixture of 
calcium carbonate and calcium hydroxide (slaked lime) with a very 
small amount of organic matter. 
