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- 

 gredients 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 throug-h the 

 hottest summer. 



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

 one part aniline is said to remove the most obstinate grease 

 spots which may have penetrated into the fibre deeply. 



Label Varnish. — Macerate together, 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 high 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 original cost. Also many other microscopes. 

 Clarkson and Co., 28 Bartlett's Buildings, Holborn Circus, 

 C. E. London, England. 



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. 



