156 BOTANICAL GAZETTE. [ June, 
he arrangement of the specimens is in accordance with the 
Genera Plantarum of Bentham and Hooker. The number of 
shelves or spaces occupied by the larger natural orders is about 
as + vise ee 12, Cruciferee 20, Caryophyllacex 12, 
Malva Leguminosee 80, Rosacez 35, ‘Onagracere 14, Um- 
bellifers 20, Rubiacese 16, Composite 180, ’Ericacese 18, Borrag- 
inacew 14, Solanaceze 12, Scrophulariacese 25, Labiatee D4, Poly- 
gonaceze 18, E eae elope os SNORE 16, Coniferze 20, Lili- 
aces 22, Cype we 36, Gra 120, Filie 
2 Sdtapletes: soieade of ‘the plants has Mean made, but it is 
estimated that of the 10,000 or more species of the United States 
(excluding the cellular cry ptogams) there are represented about 
nine-tenths. Of foreign plants the Herbarium contains probably 
fully as many species as of native ones. 
The native species are represented in many cases by a large 
number of specimens showing the range of the species, derived 
from important government surveys and expeditions, which gives 
them an historic value, as well as representing the types upon 
which the species were founded. he entire number of mounted 
sheets is from sixty to seventy thousand. 
The Library connected with the Herbarium contains all the 
common North American botanical text-books and manuals, all 
BRIEFER ARTICLES. 
Articles in back numbers.— Arrangement of herbaria, xi. 98,120; treat- 
ment of exsiccate, xi. 20; mounting plants, cement, ix. 62, glue, iv. 218 xi. 
67,120; preserving plants, earbon bisulphide, ii. 100, poison, i. 27; pressure in 
making specimens, i. 21; shipping live plants, ii. 107, 133; Myxomycetes, , their 
collection and preservation, x. 290. 
Mounting delicate plants.—To mount delicate ferns and other plants, 
take a pane of glass of sufficient size and coat lightly with rather thin fish glue. 
~ the plant on the glass and put a newspaper over it, or the reverse. With 
ief in hand, rub the paper so that every part of the plant will touch 
= glue. Remove the paper, then carefully lift the plant from the glass and 
