c9o6] 



AS A FUNGICIDE. 



159 



above the plate. The sand bath used for heating the sulphur is 

 placed on a glass tripod under the bell jar, and an alcohol lamp is 

 used to heat the sand. A definite quantity of N/io sodium carbon- 

 ate solution is placed in the U-tubes and the free end connected with 

 an aspirator, or suction pump. 



Apparatus for heating sulphur and collecting acid gases formed. A, 

 alcohol lamp ; T, glass tripod ; C, porcelain dish containing sand ; W, watch 

 crystal containing sulphur; B, bell jar supported by a clamp; S; U-tube 

 with one end ground to fit bell jar and containing 15 c.c. of tenth normal 

 sodium carbonate solution; H, U-tube containing distilled water, and having 

 one end connected with U-tube, S, by means of rubber tubing, and the other 

 with an aspirator. 



The operation was conducted as follows : To the first U-tube, 

 which was well ground to fit the opening in the bell jar, were added 

 15 c.c. of tenth normal sodium carbonate solution to combine with 

 the sulphur acids formed. To the second U-tube 5 c.c. of water 

 were added. Definite quantities of sulphur were weighed out in a 

 watch crystal, and heated on the sand bath for several hours. The 

 heat was regulated to a certain extent so as to minimize the loss of 

 the vaporized products due to their escaping from below the bell 

 jar, that is, the flame was removed at times and the space between 

 the plate and bell jar was reduced to but a few centimeters. At the ' 

 end of the operation the apparatus w^as allowed to cool, and the 

 watch crystal containing the sulphur weighed to determine the total 



