294 Mr Harvey on the employment of 



Barometer. Thermometer. Mean Temperature 



1821 27 11 4 +6 10 +11 



1822 27 11 9 +6 75 +12 



1823 27 11 8 +5 64 +10 7 



1824 27 9 5 +6 77 +11 9 



1825 28 1 +6 69 +12 5 



1826 28 7 +6 75 +12 6 



1827 27 11 4 +5 60 +11 3 



27 11 87 +5 08 +11 62 



From these observations it appears that the mean tempera- 

 ture of Ullensvang is 43° 6' of Fahrenheit's scale. This an. 

 nual temperature agrees with the temperature of constant 

 springs near the sea-shore, which never freeze, and preserve 

 the same temperature in summer and winter. They vary from 

 5° to 6° of Reaum. (43° to 45° Fahr.) 



From the last column, which contains the temperature of 

 the vegetating season, it appears that this temperature was 

 least in the years 1802 and 1812, viz. 9° 5' in 1802, and 10° 3 

 in 1812, the mean temperature of that season for thirty years 

 being 11° 62; and it is a curious circumstance that these 

 years were the years of greatest scarcity in Norway, 1802 

 being greater in this respect than 1812. 



Art. XV. — On the Employment of Equations of Condition 

 in Naval Architecture. By George Harvey, Esq. F. It. S. 

 Lond. and Edin., F. L. S., Honorary Member of the Society 

 for promoting the Useful Arts of Scotland, &c. &c. Com- 

 municated by the Author. 



The celebrated Swedish naval architect, Chapman, entertain- 

 ed the idea of deriving all the essential elements of ship-build- 

 ing from different equations of condition, and also of refer- 

 ring these to some primitive element or root ; and we find from 

 his two works, A Treatise on Ship-building, with explana- 

 tions and demonstrations on the Architectura Navalis Merca* 

 toria, and his " Investigation to determine, for Ships of the 



