68 THE AMERICAN MONTHLY [Feb 



printed matter is moistened by water containing- a little po- 

 tassium iodide in solution. This ink must be made only as 

 required for use and be used as fresh as possible. The in- 

 g-redients require to be kept in closed flasks that they may 

 not deteriorate. 



Paste. — Dissolve 2 drams alum in 1 quart water. Add 

 flour to make thick cream. Stir into it lOpowdered cloves 

 and 1 drachm rosin. Pour the above slowly, stirring- con- 

 tinually, into 4 ounces boiling- water. Let all boil till of 

 mushy consistency, stirring- to prevent burning-. If kept 

 covered and in a cool place this paste will keep through the 

 hottest summer. 



Aniline. — A mixture of one part soap, 19 parts water and 

 one part aniline is said to remove the most obstinate g-rease 

 spots which may have penetrated into the fibre deeply. 



Label Varnish. — Macerate tog-ether, shaking- occasion- 

 ally until the solids dissolve which will take a long- time in 

 the cold: Sandarac, 60 pts; mastic, 25 pts; camphor, 1 pt ; 

 oil of lavender, 8 pts ; venice turpentine, 4 pts ; ether 6 

 pts ; alcohol, 44 pts. — Nat. Druggist. 



Marine Specimens in Formalin.— Jar of Marine Alg-ae of 

 many kinds, 50 cents; helix, 10 cents; starfish, 15 cents; 

 and a list of many other specimens for sale by W. F. Webb, 

 Albion, N. Y. 



Second-hand Microscopes. — Beck hig-h class Binocular 

 with 1 1-2, 2-3, 4-10, 1-5, and 1-10 oil immersion lenses with 

 complete outfit is offered for about $80, it being- but a frac- 

 tion of the orig-inal cost. Also many other microscopes. 

 Clarkson and Co., 28 Bartlett's Building-s, Holborn Circus, 

 C. E. London, Eng-land. 



Botanical Objects. — As you know, I have had Nos. 22, 27, 

 38, 65, 81, 94, 97, 109, 112, 121, 123, 129, 130, 131 and all the 

 starches. I now enclose $6 for which please send me all 

 the remaining- numbers of White's objects which you now 

 have in stock. — C, Williams. 



, Wolle's Diatomaceae of North America with plates for 

 sale cheap. Address the Editor. 



