512 REPORT— 1873. 



5. A large number of Term-day Observations (hourly) of temperature of 

 sea (Hebrides), together with observations of pressure, temperature, humi- 

 dity, &c. during lfe58-63. 



III. Old Eegisters :— 



1. From July 1767 to November 1827, at Gordon Castle, giving pres- 

 sure, temperature, rain, winds, &c. daily, and for shorter intervals during the 

 same period at Sion House, Edinburgh, Selkirk, &c. 



2. Daily register of pressure, temperature, and rain at Carbeth-Guthrie, 

 from January 1817 to December 1859. 



3. Daily register of pressure, temperature, humidity, rain, &c. at Dollar, 

 from April 1836 to present time. 



4. A number of other weather registers, — Edinburgh, 1820-36, Castle 

 Newe, 1836-47, &c. 



IV. Monthly Means and Sums : — 



Of these may be specially mentioned the rainfall for individual months for 

 nearly the whole of 290 Stations, discussed in the Papers on the Scottish Eain- 

 fall in Society's Journal. 



As regards the unpublished meteorological information possessed by the 

 Society, the Coimcil have hitherto supplied copies of any portion of it to aU 

 meteorologists or other scientific men who have applied for it, free of charge. 

 The Council will still be glad to continue to do so in so far as the very limited 

 means at their disposal will enable them. 



I am, yours faithfully, 



Alexander Buchan. 

 Frofessor Balfour Stewart. 



Trinity House {received through Dr. J. H. Gladstone) . 



{Letter froin Dr. Gladstone to Dr. Stewart.) 



17 Pembridge Square, London, 

 28th April, 1873. 

 My DEAK Professor Stewart, 



I ought perhaps to have told you long before this what has been done in 

 regard to the Trinity House. In accordance with the desire of the Science- 

 Organization Committee, I put myself in communication with the Elder 

 Brethren about their meteorological records, and received the reply of which 

 I enclose a copy. You will see that in fully acceding to our request they 

 asked me to come and judge for myself as to the value of their records. On the 

 tirst convenient Tuesday I accordingly went to Tower Hill, and found that 

 they possessed most voluminous returns from all the Lighthouses, giving the 

 state of the barometer and thermometer, the direction and force of the vnnd, 

 with description of fog, cloud, &c. every three hours, drawn out on tabulated 

 forms, of which I send you one not fiUed up. At the Floating Lights a log- 

 book is kept, in which is entered very much the same particulars, but not so 

 frequently during the day, and not in a tabulated form. 



Captain Nisbet, the Chairman of the Light Committee, spoke to me about 

 the diiferences he had observed between the readings of different barometers 

 and his endeavour's to obtain the true correction for each. He has also tried 

 to get " fog-marks " set up at the same distance from the different light- 

 houses ; but at present there is no accepted definition as to where a " mist 



