eae. IViICROSCOPRE 
VOL. IV. 
WHOLE NO. ar 
Ann Arbor, February, 1884. 
No. 2 
CONTENTS. 
PAGE, 
Original Communications. 
Section Flattener for Dry Section Cut- 
ting. By Simon H. Gage and Theo- 
baldiomsithere ceecices ce ecis: eos 25 
The Parabola as an Illuminator for 
Homogeneous Erumersion Objectives. 
By-Av YY. Moore, Mi D..o)v..- 27 
Give Credit to Whom Credit is Due. 
eed iProf.-Albert McGalla. i) ..2.. 0. 30 
ier oecopical Incident. By Dr. Al- 
fred Cr StOKeSacab nacho dee coe ss 
PAGE. 
Editorial Department. 
Proceedings of the American Society.. 
Important Changes in eS 
HOUSES iia o:) Sess 5s cnas aes nee aoe 39 
Another Microspica! Journal.... ..... 40 
Editorial Notes#: 5.sc ee seer ocean ee 40 
Selections. 
Imbedding in Egg Mass . ........... 42 
Rapid Method of Demonstrating the 
Tubercle Bacillus without the Use 
33 3 
Gleanings from the Journal of the I ote Ret ee 
Royal Microscopical Society for De- TEMS .« - ee eee reese ee eee ele Baten ins —aie 44 
cember. ‘By ©. H. Stowell..... -... 35 REVIEWS hn 2) ku asa scan a ee 46 
COPrESPONGENGO 2}. [ioc .ck2 meee a 38 Hxchanges)...<\c.t0 san cite chine eee 48 
Original Communications, 
SECTION FLATTENER FOR DRY SECTION CUTTING. 
(Note r and 2.) 
BY SIMON H. GAGE AND THEOBALD SMITH. 
N making sections by the so-called dry method, the curling of the 
sections has proved the most serious difficulty. This defect in 
the method is of especial importance when serial sections are made, 
for in that case every section must be saved, 
To overcome this difficulty a brush has been recommended, but 
to use this requires one of the hands of the operator or an assistant. 
Schultze, as an attachment to the microtome, has devised a spring 
which rests upon the sections and holds them against the knife as 
they are cut; but this requires a sliding microtome and hence its ap- 
plication must be somewhat limited (note 3). Our own efforts in 
solving the problem have been directed toward the composition of 
the imbedding mass and an attachment to the ordinary section knife 
or razor, suggested by Valentine's knife. This modification consists 
in replacing the second blade of Valentine’s knife by a rod. We 
