XIV 
CONTENTH. 
Mr. J. Nasmyth on a Method of Boring Holes in Rock for Tunneling Pur¬ 
poses . .. 
Mr. Prosser on Unchanged Steam . 
Mr. W. J. Macouorn Rankins on the Means of realizing the advantages 
of the Air-Engine . . . 
Mr. John Scott Russkll on the Progress of Naval Architecture ami Steam 
Navigation, iucluding a Notice of the large Ship the Ea-t- ni • team . “ - 
gation Company ... .. 
Mr. Saxby on Mechanical Appliances on board Merchant Ship" 
Rev. Dr. ScoitiiSRY's Impiin us to the Principles «'“J ' 
Safety in the Navigation of Iron Ships may he rensonabK l‘X» ‘ 1 
Mr. John Sewell on Steam-boiler Explosions ^ ^ 
Mr. Andrew Smith on the Origin of Wire Rope; its Qualities >" l ‘ 1 1 ^ ^ ^ 
Professor Stevelly ont.hu Limit of Weight which may suf<’l> 1,1 . . 
driven into the Ground . . 
Mr. J. Statheu on uu Improved Printing Machine . ^ Water 
Mr. J. Thornton’s Report of Experiments on the I' ' ri1 ’" ''* *. 
and on the Experiments to be made on Centrifugn* 1 u,,,| ’ s ( A j t . t i„,<ls of 
Mr. J. B. Lawks and Dr. J. II. Gilbert on the Amount* ‘»l.. 
Estimating, Ammonia and Nitric Acid in Rain-water. fishery 
on the Herring . 
Ptgt 
157 
159 
159 
160 
161 
161 
162 
162 
163 
163 
Mr. W. Russell’s Letter to John Cleghom, 
averages of Wick District . 
163 
164 
176 
Index I. — To Reports on the State of Science .. s 
Index II. To Miscellaneous Communications to tin’ ■~ l 1 
177 
179 
ADVERTISEME nT ’ nsible only <« ,he ^ 
The Editors of the preceding Notices consider theni^ lveS 
with which the views of the Authors are abstracted. 
