SA Supplements

October 1885

Volume 20, Issue 509supp

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Features

Microscopic Gleanings

C. H. Stowell

The Chamberland Filter

Rapid Determination of Nitrogen

A. Houzeau

Photo-Micrographs on Gelatine Plates for Lantern Projection

Wm. H. Walmsley

How to Mount Large Insects

Rofessor Leonhard Weber's Photometer

Boverton Redwood

A Cellular Structure in Cast Steel

Osmond, Worth

Foundations of St. Mark's Venice

Detection of Nitric Acid in Air, Water, and Soils

A. Grandval, H. Lajoux

Reducing Properties of Oxygenated Water

On the Construction of Rolling Cams

C. W. MacCord

Locomotive Power, N. Y. Elevated Railroad Trains

Angus Sinclair

Gas Engine Economy

The Post Office in the Time of Washington

Progress of Telephone Litigations

Sickness and Sea Air

Ravaglia's Hydrometrograph

New Analogies between Electric Phenomena and Hydkodynamic Effects

C. Decharme

A Chapter from Dr. Le Plongeon's New Book, “Monuments of Mayax”

Ocean and Air Currents

The Ruins of Humpi, Madras Presidency

Measurement of Blood Corpuscles

Marshall D. Ewell