VOL. LXl.] PHILOSOPHICAL TRANSACTIONS.. 181 



that of the box. Into every box he put similar bits of the phosphorus. These 

 inclosed bits were exposed to the sun altogether ; then taking the boxes into the 

 dark, and ojxjning them, he saw that the piece of phosphorus was green, which 

 was imbued with the light through the green glass ; but red, through the red 

 glass; and yellow, through the yellow glass: that is, it appears by this experi- 

 ment that the phosphorus emits not only the light imbibed, but each its own 

 light also. 



XXf^I. Remarks on the Effects of the late Cold in February last : in a Letter 

 from the Rev. R. IVatson, Professor of Chemistry at Cambridge, p. 213. 



Reprinted in Bishop Watson's Chemical Essays. 



fij 



XXVII. A Letter from Thomas Barkery Esq., of Lyndon in Rutlandshire, con- 

 cerning Observations of the Quantities of Rain fallen at that Place for several 

 Years, p. 2'21. 



Subjoined is the quantity of rain, which has fallen at Lyndon in Rutland, since 

 May 1736, with a table of the mean rain in the first 4 or 5 years, and every 10 

 years since ; which shows that there has been more rain in the latter part of this 

 period than in the former. But the least 4 years were from 174O to 43, little 

 more than l6-j- inches a year ; and the greatest 4 years from 17 67 to 70, above 

 Q,5\ inches a year. For comparing of dry seasons and wet ones, Mr. B. has 

 made a table of the 3 driest months, the 3 driest 2 months, 3, 4, &c. to 1 2 suc- 

 cessive months; and a like table of wet ones: but as the years 1763, 68, 70, 

 exceeded any others, he made another like table of them. No 3 months come 

 up to the last quarter of 1770, 7-i- inches of which came in 3 weeks, from Nov. 

 6 to 26 ; but 1763 and 68, were better than 70, except those 3 months : and in 

 this country 63 was the wettest ; yet he supposes 68 exceeded it in many places. 



Feb. 1 2 last, the thermometer abroad was down at 4 of Fahrenheit's scale, 

 which is lower than he had observed it in above 20 years past ; the lowest he had 

 before observed was IO-I-, Jan. 5, 1768. . 



It was remarkable, that as long as the wind continued n. e. the frost was mo- 

 derate; when it turned s. w. it became very severe; and when the wind turned 

 back into the east again, the frost went away. This looks as if the weather was 

 severer southward than here i as he thinks was likewise the case in Feb. 1754, 

 which was also a very cold season. 



XXVIIL A second Letter from Mr. Barker, on the same Subject ; together with 

 the Determination of the Latitude of Stamford, in Lincolnshire, p. 227. 



Mr. B.'s rain cistern has all along stood on the top of a wall, where another 

 meets it at right angles. The top of the cistern on the north side, is 7 feet S 



8 * •■ (fi»yft« 



