--With two engravings.
An Improved Iron Frame Gang Saw Mill.--With one large
engraving.
The Heat Regenerative System of Firing Gas Retorts.--Siemens'
principle.--As operated at the Glasgow Corporation Works.--With
two engravings.
A New Gas Heated Baker's Oven.
III. TECHNOLOGY.--How to Produce Permanent Photographic Pictures
on Terra Cotta, Glass, etc.--With recipes and full directions.
How to Make Paper Photo Negatives.--Full directions.
Some of the Uses of Common Alum.
An Improved Cloth Stretching Machine.--With an engraving.
Purification of Woolen Fabrics by Hydrochloric Acid Gas.
Apparatus for Preventing the Loss of Carbonic Acid in Racking
Beer.--With an engraving.
IV. ELECTRICITY.--Application of Electricity to the Bleaching of
Vetable Textile Materials.--With figure of apparatus.
Table Showing the Relative Dimensions, Lengths, Electrical
Resistances, and Weights of Pure Copper Wires.
V. ASTRONOMY.--The Solar Eclipse of 1883.--An interesting abstract
from a report of C.
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