10 
Collection between 1892 and 194l, when the Society relinquished care 
of it. 
The Bailey Collection: 194l-present 
The use of the Bailey Collection since its receipt by the Farlow 
Herbarium in 194l has been apparently meagre. I have found only that 
the Academy of Natural Sciences of Philadelphia had borrowed a small 
portion of it, that N. Ingrahm Hendey had used it in 1953 and designated 
several types of Bailey's species 1 names of diatoms, and that Robert 
Ross had perused it in 1962 and left notes concerning its reorganization. 
The present Bailey Collection primarily with respect to its diatom 
materials is composed of three major parts, each deriving its organization 
from the 1857 bequest: 
A) A MICROSCOPIC SLIDE COLLECTION including related paleographs and a 
catalogue of the slides and their contents. 
The 1,216 slides contained in this collection are the remnants of 
the "Microscopical Collection" described in the 1857 bequest. With a 
few exceptions, each slide bears a number between 567 and 2,l85 scratched 
into the glass. This collection currently includes slides that I found 
in 1976 in l) 24 octavo cardboard slide boxes, each possessing a label 
on its inside cover indicating "Boston Society of Natural History/Bequest 
of/Prof. J.W. Bailey/April, 1857" (Table l), 2) two century wooden slide 
boxes each containing c_. 100 slides, 3) two wooden folders bearing 30 
large and odd-sized glass slides, 4) an unnumbered small green box 
with J.W. Bailey's name on it found at the Academy of Natural Sciences 
of Philadelphia and containing slides numbered from 1527 to 1537 s and 
5) an octavo slide box from the Boston Society of Natural History 
general slide (non-Bailey) collection containing slides numbered from 
1538 to 15^2 and from 1752 to 1796. All these materials were found in 
