18 



plain, however, to those who have applied Bessel's formula to the 

 investigation of Meteorological phenomena, that a duodecantal 

 term exists which deserves attention — that is a term which has 

 twelve maxima and twelve minima in each year " — and he illus- 

 trates this by using the formula on the Kew temperatures of July, 

 1869. Again, a paper was published in the Phil, Transactions in 

 autumn last that very forcibly elucidates its utility. It is entitled 

 " The Diurnal Variations of the Wind and Barometric Pressure at 

 Bombay. By F. Chambers." It undertakes to demonstrate " that 

 a remarkable relation exists between the diurnal variations of the 

 wind, and the double diurnal oscillation of the barometer at Bom- 

 bay." It finishes by pointing out that the law is so general, as, 

 in a more or less definite manifestation, to pervade many other 

 climates, — distinctly that of the Orkney islands. It has long been 

 coming into light that the movements of the mercury in the baro- 

 meter are associated with the velocity of the wind ; and we are 

 now clearly arriving at a stricter knowledge in relations of this 

 order. 



We should a priori imagine that any meteorological law that 

 may override minor deviations of climate would be more likely to 

 be evinced in the steadier climate of Bombay than in a gusty one 

 like ours. 



Dr. Le Neve Foster read the Lists of Presents : — 



DONATIONS TO THE MUSEUM. 



Crocodile Mummies Mr. A. Pendarves Viviaii,M.P. 



Axinite. From Pit close to the Cross near the 



Old Church in the Sand, Perranzabuloe . . Dr. Le Neve Foster. 

 Garnets found with Axinite near the Old 



Cross, Perranzabuloe Ditto. 



Garnets and Garnet Eock, from Smallacombe 



Iron Mine, Devon Mr. J. H. Collins. 



Garnets and Garnet Eock, from Great Eetallack 



Mine, Perranzabuloe Ditto. 



Garnets, from Wheal Devonshire, St. Agnes . . Ditto. 



Hornblende, from Great Eetallack Mine, 



Perranzabuloe Ditto. 



Vivianite, or Phosphate of Iron, from Gravel 



Hill Iron Mine, Perranzabuloe Ditto. 



Epidote, from Huel Cock Cliffs, St. Just .... Ditto. 



Fine Crystal of Mica, from the Phosphorite 



Deposits of Canada Ditto. 



Fragment of the rare substance Selenium . . Ditto. 



Three small rough Diamonds, from the Cape 



of Good Hope Ditto. 



