242 
BIOGRAPHICAL NOTICES. 
1845. On Vibrations producing Sound. 
1846. Oil the comparative economy of various methods of applying 
power for Locomotion on Railways, and particularly on the 
Atmospheric System. 
1847. On the Strength of Materials. On a New Galvanometer, 
and of some of the phenomena of Voltaic Currents. 
1848. On a mechanical communication for the working of Signals 
and Brakes on Railways. 
1849. On Improvements in the Galvanometer, and on the com- 
parative Economy of various Voltaic arrangements. 
1850. On a New Gas Stove. 
1851. On the use of the Barometer in Coal Mines, and a cheap 
form of instrument for that purpose. 
1853. On a new Thermostat for regulating Ventilation. 
1855. On the Collodio-Albumen Photographic Process as applicable 
for copying mechanical and scientific objects. 
In 1845, Mr. Ward obtained a patent "for improvements in 
exhausting air from tubes or vessels for the purpose of working 
atmospheric railways, and for other purposes." The paper which he 
communicated to the Society in the following year showed that he 
was a sanguine supporter of the atmospheric system of propulsion, 
which was still a possible rival of the locomotive for the working of 
railways. Mr. Ward did not refuse to admit that the locomotive had 
the advantage in duty performed on a level road, but he thought 
that the slipping of its wheels in ascending an incline would result 
in a preference for the atmospheric system. 
From failing health, Mr. Ward spent the last few years of his 
life in retirement, continuing, however, his scientific pursuits. He 
died in 1885. 
The succeeding memoir of Robert Hunt, F.R.S., has been 
derived from the article by Mr. T. W. Newton, in the "Western 
Antiquary," issued December, 1887 ; and a contribution to " The 
Biograph and Review" for August, 1881 ; both kindly placed at the 
disposal of the writer by Mr. James B. Jordan, of the School of 
Mines, London. 
