THE AMERICAN 
‘ MONTHLY 
MICROSCOPICAL JOURNAL. 
Entered at the post-office as second-class matter. 
VOL. XXll. MAY, 1901, NO. 5. 
——-— 
CONTENTS. 
On the Resolution of Amphipleura pellucida with a Dry Lens 
en0 Beier ceemmation. Merlin I2I-130 
Does Rabies Originate Spontaneously? Salmon... 130-137 
Terminology of the Study of Blood, Normal and Abnormal. 
Oren Pomme mr hii oe he bt eR Oe a 138-143 
BIOLOGICAL Nores. —Pammel. Myxobacteria; Nematode 
Galls on Algze; Mushrooms; Embryological Studies of 
Quercus; Sclerotinia ; Myxomycetes ; Tuber-like Bodies of 
CCE ee he Ud eR 144-147 
MICROSCOPICAL MANIPULATION. Examining Sputum ; Botan- 
a RRR aa. SECTOR RON 147-148 
MEDICAI, Microscopy.—Sarcoma; Sea-weeds............... 148-149 
MICROSCOPICAL SOCIETIES.—Quekett Club 149-150 
NEw PUBLICATIONS.—Das Mikroskop in Chemischen Labora- 
torium ; Die Technik des Modernen Mikroskopes; Stras- 
berger’s Botany; Alpheus’ Astrology ooo oo. cecceeee coos on 150-150 
On the Resolution of Amphipleura Pellucida, etc. 
With a Dry Lens and Axial Illumination. 
A. A. MERLIN, F.R.M.S. 
(Read November 16, 1900). 
Many members of our Club have been long familiar with | 
the structure of Amphipleura pellucida as revealed by oil- 
immersion objectives of the highest class and aperture. 
The point to which I now beg to call your attention is the 
accomplishment of the resolution of-normal specimens of 
this diatom by means of Zeiss’s dry 4 mm. apochromat, 
and a 5-6ths solid axial cone from Powell’s adjustable 
apochromatic condenser. 
I was led to attack the A. pellucida with the above spec- 
