xxx Proceedings of Royal Society of Edinburgh. 
34. Description of a new Waving Bar for Engravers’ Ruling Machines.’’ 
Society of Arts, 30th January 1839. 
35. “ Essay on the Law of Mortality in England and Wales, deduced from 
the Return by the Registrar-General.” December 1839. 
36. “Essay on the Bonus System of Life Assurance Offices.” January 
1840. 
37. “ On what Constitutes the Profits of a Mutual Assurance Society, and 
on the only Equitable Method of Distributing these among its Members.” 
January 1840. 
38. “ On the Money Values deduced from the various Bills of Mortality.” 
March 1840. 
39. “ On the Construction of Circular Signal Towers. ” April 1840. 
40. “ On the Effects of the Curvature of Railway.” May 1840. 
41. “ On the Nodus Rosi (a Phenomenon Exhibited by some Specimens of 
Calcareous Spar brought from Iceland by Mr Rose).” Society of Arts, 8th 
March 1841. 
42. “On the Proper Form for the Convertible Pendulum.” July 1841. 
43. “ On an Erroneous Deduction from Captain Eater’s Experiments on 
the Flexure of Thin Bars.” April 1841. 
44. “ On a Method of Registering the Force transmitted by a Driving- 
Belt.” 
45. “ Life Assurance and Annuity Tables— One Life in Folio.” Edinburgh 
1841. 
46. “ Delineation of the Annular Eclipse of the Sun as it will be seen from 
Constantinople on Saturday, October 9th, 1847.” May 1847. 
47. “Account of Observations made at Sevastopol on the Solar Eclipse of 
July 18th, 1851.” Read before the Royal Scottish Society of Arts, 24th 
November 1851. 
48. “ A New General Theory of the Teeth of Wheels.” Edinburgh, 1852. 
49. “ Description of a Chronofore or Hackwatch for Measuring to Minute 
Intervals of Time.” Society of Arts, 27th November 1854. 
50. “ Theory of Driving-Belts.” Society of Arts, January 1855. 
51. “On an Improved Mode of Constructing Standards of Weight.” 
Society of Arts, December 1855. 
52. “ On an Inaccuracy (having its greatest value about 1") in the usual 
Method of Computing the Moon’s Parallax.” Read before the Royal Society 
of Edinburgh, 19th February 1855. 
53. “ On the Accuracy attainable by Multiplied Observations.” Read be- 
fore the Royal Society of Edinburgh, 30th April 1855. 
54. “ Geometry is a purely Experimental Science.’’ Read before the Royal 
Society of Edinburgh, 7th January 1856. 
55. “ On the use of the Altitude and Azimuth Circle for Stereometric Sur- 
veying.” Society of Arts, January 1856. 
56. “ On Turkish Weights and Measures.” Read before the Royal Society 
of Edinburgh, 4th February 1856. 
57. “ Theory of the Free Vibration of a Linear Series of Elastic Bodies.’’ 
Read before the Royal Society of Edinburgh, 18th February 1856, and pub- 
lished in the Edinburgh Philosophical Journal. 
58. “ Elementary Arithmetic.” W. Blackwood & Sons, 1856. 
