JOURNAL OF THE ROYAL MICROSCOPICAL SOCIETY. 
MARCH, 1922. 
CONTENTS. 
TRANSACTIONS OF THE SOCIETY. 
PAGE 
I. — The Micro-Examination of Metals, with Special 
Reference to Silver, Gold and the Platinum 
Metals. By George Patchin, A.R.S.M., M.I.M.M. 
(Two Plates) 1 
II. — The Age and Growth of Some Eels from a Small 
Worcestershire Pond. By A. Gandolfi Hornyold, 
D.Sc., F.R.M.S. (Eight Text-Figures) & 
III. — Notes on Fresh-water Ciliate Protozoa of India. 
—II. By B. L. Bhatia, M.Sc., F.Z.S., F.R.M.S., 
Assistant Professor of Zoology, Government College, 
Lahore 27 
IY. — Contributions to the Histology of the Three-toed 
Sloth (Bradypus Tridactylus). By Charles F. 
Sonntag, M.D., F.Z.S., F.R.M.S., Anatomist to the 
Zoological Society of London ; and F. Martin Duncan, 
F.R.P.S., F.Z.S., F.R.M.S. (Thirteen Text-Figures) . . 37 
SPECIAL NOTICES. 
ANNUAL SUBSCRIPTIONS. — The Fellows of the Society are reminded that 
Annual Subscriptions become due on the first day of January, and early remittance 
will be greatly esteemed. 
THE BIOLOGICAL SECTION meets in the Library on the first Wednesday 
in each month at 7 for 7.30 p.m. Hon. Secretary, Mr. J. Wilson, 3 West Park Road, 
Kew Gardens, S.W. 
THE LEATHER INDUSTRIES SECTION.— Hon. Secretary, Dr. S. H 
Browning, 22 Harley Street, W.l 
THE METALLURGICAL SECTION. -Hon. Secretary, Mr. F. Ian G. 
Rawlins, White Waltham Grove, Maidenhead, Berkshire. 
THE PAPER INDUSTRIES SECTION. —Hon. Secretary, Mr. James 
Strachan, F.Inst.P., 74 Blenheim Place, Queen’s Cross, Aberdeen. 
THE ANNUAL EXHIBITION OF MICROSCOPIC POND LIFE will 
be held at the Society’s Rooms on Wednesday evening, May 17th, 1922, at 7.30 for 
8 o’clock. Offers of assistance from Fellows who can exhibit living specimens will 
be gladly received by the Hon. Secretaries. 
INDEX FOR 1921. — The Title-Page, Contents and Index for the 1921 Volume 
will be found at the end of this Part. 
THE TRADE DIRECTORY AND INDEX TO ADVERTISERS will be found 
on page 15. 
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