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tic fruits. In these classes, the aim has been to select 
such representatives of each kind as will most perfectly illus- 
trate the parentage, simple or mixed, and the extreme vari- 
ations of the article in respect to size, form, color and other 
qualities. All these specimens have been preserved in the 
formaldehyde solution and have kept perfectly with the ex- 
ception of a few tints. 
Other collections which are in progress of preparation for 
donation to us are as follows: 
Messrs. Merck & Co. are preparing a large and very 
valuable collection representing the active constituents of 
plants. 
Messrs. D. H. McAlpin & Co. are preparing a collection 
of tobaccos. 
The Crude Rubber Co. is preparing a collection of crude 
rubbers. 
Messrs. Clarence Lown & Co., of Poughkeepsie, N. Y., 
and the Rugg Manufacturing Co., of Greenfield, Mass., are 
preparing exhibitions of the special woods used in their 
wooden ware manufactures, and of the objects manufactured 
therefrom. 
One rather extensive set of material pertaining to this 
class has been liberally donated by the International Paper 
Co., of this city. 
Others promised or partly promised include an illustration 
of drug extracting by Messrs. Parke, Davis & Co., one of 
drug standardization by Messrs. Gilpin, Langdon & Co., of 
Baltimore, and one of medicated plaster manufacturing by 
Messrs. Seabury & Johnson. 
Although it is not practicable to state at present the num- 
ber of specimens ready to go into our cases, it may be said 
that they are sufficient to make a very creditable exhibit. 
Respectfully -submitted, 
H. H. Russy, 
ffon. Curator. 
