The Project Gutenberg EBook of Scientific American Supplement, No. 492,
June 6, 1885, by Various

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Title: Scientific American Supplement, No. 492, June 6, 1885

Author: Various

Release Date: June 2, 2004 [EBook #12490]

Language: English

Character set encoding: ASCII

*** START OF THIS PROJECT GUTENBERG EBOOK SCIENTIFIC AMERICAN ***

Produced by Don Kretz, Juliet Sutherland, Charles Franks and the DP Team

[Illustration]

SCIENTIFIC AMERICAN SUPPLEMENT NO. 492

NEW YORK, JUNE 6, 1885.

Scientific American Supplement. Vol. XIX, No. 492.

Scientific American established 1845

Scientific American Supplement, $5 a year.

Scientific American and Supplement, $7 a year.

* * * * *

TABLE OF CONTENTS.

I. ENGINEERING AND MECHANICS.--The New Spanish Artillery.--2
engravings.

Qualitative Tests for Steel Rails.--By L. TETMAJER.

A New Form of Small Bessemer Plant.--By A. TRAPPEN.

Triple Compound Engines.--A paper read by A.E. SEATON
before the Institution of Naval Architects.

Early History of the Steam Jack.

Bridge over the River Adige, at Verona.--13 figures.

Pumping Machinery.--Mine pumps.--Direct acting steam pumps.
By E.D. LEAVITT.

Improved Gun Pressure Gauge.--2 figures.

Measuring the Thickness of Boiler Plates.

On an Express Engine.

II. TECHNOLOGY.--Improved Plaiting Machine.--With engraving.

Self-acting Shuttle Guard.--1 figure.

Ruler and Triangle for Hatching.

The Distillation of Sea Water.--1 figure.

Aids to Correct Exposure on Photographic Plates.--An
interesting paper by W. GOODMAN.

Isochromatic Photography.--By FRED. E. IVES.--2 figures.

Distortion from Expansion of the Paper in Photography.

III. ELECTRICITY, ETC.--On the Fritts Selenium Cells and
Batteries.--A paper read before the American Association
by C.E. FRITTS.

Electricity Applied to the Manufacture of Varnish.--2 figures.

Naglo Brothers' Telephone System.--3 figures.

The Gerard Electric Lamp.--1 figure.

A New Reflecting Galvano