xi CONTENTS. 
Page 
Messrs. W. J. Macavorn Rankine and JoHnN THomson on Telegraphic 
Communication between Great Britain and Ireland, by the Mull of Cantyre 128 
Mr. W. J. Macavorn RANKINE’s Remarks on the Mechanical Process for 
Cooling Air ia Tropical Climates proposed by Prof. C. Piazzi Smyth ......... 128 
Capt. J. SauNDERs’s Design for Safety Harbours ......-.+... Seeevacdsuneakeasans oe 
Mr. W. H. Smiru on the Natural Peculiarities and Advantages of the Mineral] 
Field and the proposed Harbour of Fair Head .......++4. Wonsiacedeasobnas evecnsees 129 
Professor C. P1Azz1 SMyTH on Penrose and Bennett’s Sliding Helicograph ... 129 
Mr. James THOMSON on some Properties of Whirling Fluids, with their appli- 
cation in improving the action of Blowing Fans, Centrifugal Pumps, and cer- 
Lars KPHOS GRP nT DINESiates. dette ese seis soo. canesuseushy copes odapsencadeseapoamadbeaneds 130 
—_—_________——— on a Jet Pump, or Apparatus for drawing up Water by 
the Power of a Jet .cc.-e.eeeee Seacion ce PHO RELOLIS oe wake ss Shoudedeanaen aaeeee es 
Mr. W. S. Warp on the Production of Cold by Mechanical Means...... Po 1 131 
Mr. Cuartes V. WALKER on Telegraphic Time Signals ........-sececseeseeeeeees 131 
—_—_—-————_— on Graphite Batteries...sccccs.cseeeceeseecceeseneenee «. 132 
Mr. Tuomas WEBSTER on the New Patent Law .........csccssseeevseensence Ceogat dae 
Mr. MarrHew Wuytaw on a New Method of Scutching the New Zealand 
Flax (Phormium tenaz) ...... OES Ss wtupe ices ab ceinisdturme twats «cull deawne demewegereee dents 
Mr. ALrrep J. WoopHovsse on the Mould for casting Conical Bullets ...... 132 
InDEXx I.—To Reports on the State of Science .........ccseseesecesseceeseeesenens - 133 
INDEX II.—To Miscellaneous Communications to the Sections ans inde 5 aiaecaas ales 
ADVERTISEMENT. 
The Editors of the preceding Notices consider themselves responsible only 
for the fidelity with which the views of the Authors are abstracted. 
