298 The Miceoscope. 



able qualities of a universally-useful cement. To lovers of the 

 beautiful, King's scarlet or blue cement is pleasing to the eye, while 

 that large class of microscopists to whom such beauty is a blemish, 

 will find in his amber cement, reliability shorn of any objectionable 

 featui'es. In every instance which I have known where King's 

 cements have not proved fully satisfactory, the fault has been with 

 the user. In using Mr. King's cements four points are to be 

 observed: 



(1) Keep your cement of the right consistency, if too thick thin 

 it with alcohol. 



(2) Use a Winsor & Newton Rigger brush No. 2; have its 

 handle put through rubber cork and so keep the brush when not in 

 use in a corked vial of alcohol. 



(3) While using the brush wash it frequently in alcohol. 



(4) Use no cement cells until they are thoroughly dry. 

 Observing these precautions we have an infallible cement. 



LongMeadow, Mass. 



PROCEEDINGS OF SOCIETIES 



THE SAN FRANCISCO MICROSCOPICAL SOCIETY. 



THE regular meeting of this society was held in the society's 

 rooms August 10, 1887, President AVickson and a large 

 number of members being present. In the absence of Secretary 

 Breckenfeld, Dr. C. P. Bates, of Berkeley, acted as Secretary. 



Among donations to the cabinet were four slides of tubercular 

 bacilli from Dr. Riehl, of Alameda, stained with different prepara- 

 tions. William Norris presented a recently-issued part of Walker & 

 Chase's series of "New and Rare Diatoms." Mr. Norris remarked 

 the singular beauty of some of the newly-discovered diatoms. Those 

 shown were from the Barbadoes deposits, a locality which has yielded 

 fine finds of foramifera. 



Prof. Henry G. Hanks read an interesting paper, illustrated by 

 diagrams, concerning a diamond found in this State. The first dia- 

 mond, he said, was found by Mr. Lyman, of New England, who saw 

 in 1850, in the new gold mines, a crystal about the size of a small 

 pea. It was slightly straw-colored and had convex faces. From 

 that time to the present these gems have been occasionally found in 

 our State, but never in large numbers, nor of unusual size. Professor 



