Improved Shingle and Barrel-head Sawing Machine, Torpedo Experiments in England

Utilization of Refuse Matter

Bridge Building--The Bridge of the Hart Ford, Springfield and New Haven Railroad over the Connecticut

Miscellaneous Summary

Jacob's Safety Gas Valve

Cipher Writing

Nitro-Glycerin Again--How to Make it Safe

Jones's Bench Vise

Gleanings Form the Polytechnic Association

Special Notices

New Publications

End of Volume XIV

System a Means of Economy

Adoption of the Metric System

Patent Claims

Issued from the U. S. Patent Office