.* 114
Rock sections for microscopy. 117
Roofs, leaky slate (1). 123
Rose bushes, soot for. 119
Salicylic acid for the feet. 115
Sawdust in rough casting. 114
Seed-distributing panthers. 111
Self-reliance and success. 121
Snow a fertilizer. 119
Something to do. 121
Spectroscope prisms (11). 123
Steam engine, Papin's. 120
Steam engine, the Brown. 120
Suicide statistics. 116
Telegraph, the speaking. 120
Trolling hook, improved*. 114
Watch, position of a (13). 123
Waterproofing, suint for. 114
White color in animals. 114
Wire, crossing a river on a. 121
Wool, purifying. 114
Zinc roofs (4). 123

* * * * *

TABLE OF CONTENTS OF
THE SCIENTIFIC AMERICAN SUPPLEMENT,
No. 60,
For the Week ending February 24, 1877.

I. ENGINEERING AND MECHANICS.--Artificial Production of Ice by Steam
Power--The American Roller Skate Rink, Paris, 1 engraving.--The Little
Basses Light House, 4 figures.--The Souter Point Electric Light.--On
the Minute Measurements of Modern Science, by ALFRED MAYER.--Method of
Measuring by Means of the Micrometer Screw furnished with the Contact
Level; Method of Electric Contact Applied to Measurements with the
Micrometer Screw, 2 engravings.--Abstracts from Report of the Boston
Society of Civil Engineers on the Metric System.--New Turret Musical
and Chiming Clock for the Bombay University, with 1 page of
engravings.--Water Gas and its advantages, by GEO. S. DWIGHT.--Brattice
Cloths in Mines.--Eight Horse Power Portable Steam Engine, with
dimensions, particulars, and 1 page of engravings.--Clyde Ship
Building and Marine Engineering in 1876.--Four Masted Ships.--New
Bridges at and near New York city.--The Sutro Tunnel.--Independent Car
Wheels.--Passenger Travel, New York city.

II.--TECHNOLOGY.--Design for Iron Stairway, and Iron Grilles, with 3
engravings.--The Process of Micro-photography used in the Army Medical
Department.--Direct Positives for Enlarging.--A Monster
Barometer.--Architectural Science, Carpentry Queries and Replies.--The
Carpet Manufactures of Philadelphia. How the Centre Selvage is Formed,
3