THE AMERICAN 
MONTHLY 
MICROSCOPICAL JOURNAL. 
Entered at the post-office as second-class matter. 
VOL. XXIll. APRIL, 1901, NO, 4. 
CONTENTS. 
‘Technique for the Recognition of Certain Animal Parasites 
im, Mt emrote t aratrated fi he ; 91-97 
History of the Compound Microscope in Pharmacy .................. 97-99 
A Peep Through the Magic Glass. Saunders 0. 99- LOI 
“The Germ of Cancer a Protozoan, Single Cell. Gaylord... 102-103 
NOTES BY SHILLINGTON SCALES.—Royal Society; Fresh-water 
Entomostraca; Swift’s Condensers ; Tariff; Collodion...._. 104-107 
PostaL Notes,—Bacteria in Water; Scales of Clothes-moth: 
Antenne of Cockchafer ; Paddle-leg of Dytiscus; Epidermis 
of Anuricula leaf; Tubercle in Spleen 0 ee ee. 107-111 
EDITORIAL. —Dictionary of Medicine ; Dr. Holland ; Photo-mi- 
crographic Show ; Dr. Boston’s paper ooo. cece ccecee cceceeceeees III-112 
MICROSCOPICAL MANIPULATION.—Humian blood; Crystalliza- 
tion; White Corpuscles; Stain for Fibers in Sputum ; 
Staining Gonococcus ; Solution of Copal; Urinary Deposits. 112-115 
BIOLOGICAL NoTEsS,—Pollens ; Small-pox ees 115-116 
BACTERIOLOGY.—Scarlet Fever Coccus ; Tubercle Bacilli in 
Butter; Chemistry of Canada Balsam Yd, Ee 
MICROSCOPICAL, SOCIETIES.—Saturday Night 5" baa Rs maa 117-118 
NEw PUBLICATIONS.—Detroit Medical ; Algze ; Magnetic Heal- 
ing; Hypnotism; Atoms and Energies MERU eres wae” Or 118-120 
Technique For the Recognition of Certain Animal 
Parasites In Man. 
_ I, NAPOLEON BOSTON, M. D., 
ANCHYLOSTOMA DUODENALE.—The condition produced 
_ by this parasite, when present in the intestinal canal of 
man, is known as brickmakers’ disease, or tropical ane- 
mia. Ova of this parasite are found in the feces of in- 
fected persons, and their detection is readily accomplish- 
ed in the following manner: ‘Toa small portion of a re- 
cently voided stool, sufficient water is added to produce 
a cloudy liquid, when the stool and water are thorough- 
ly mixed. A portion of the mixture is placed into a test 
tube and either centrifugated, or allowed to stand for a 
