DR DAVY ON THE RAIN-FALL IN THE LAKE-DISTRICT. 59 



drops collected in the usual manner, left a circular marginal stain, conspicuous 

 to the unaided eye. Under the microscope it was seen to be formed of minute 

 crystals, of numerous granules, and of many spheroidal particles like pollen. 



5. Septembei' the 8fh. — Slight rain in the afternoon, the morning overcast ; 

 •06 inch of rain only during the preceding twenty-four hours. A few drops, col- 

 lected just after the rain began, left only a just perceptible stain, in which, under 

 the microscope, there was no appearance of crystals, but merely of fine particles 

 (dust particles?), and other particles, from their form conjectured to be of 

 pollen. 



6. September the 10th. — This morning there was much dew on the grass. A 

 few drops of it collected on a glass-slide, showed no crystals, only many particles 

 like those of pollen. 



7. September the lUh. — The wind S.W. and strong; the sky overcast with 

 dark drifting clouds ; showers frequently. The rain-drops left a well-marked 

 stain, and under the microscope a marginal crystallization was seen very like 

 that of muriate of ammonia. An hour later the drops collected yielded a similar 

 stain, but less strongly marked. Later still in the day, the drops collected — these 

 larger than the preceding — left a strong stain, in which were seen some cubical 

 crystals like those of common salt, two or three spearhead-shaped, and others, 

 which were more like muriate of ammonia crystals. 



9. September the 22d. — Yesterday fine, the wind northerly and gentle ; -33 

 inch of rain during the night. Some drops of rain then collected left a faint 

 marginal stain, in which were a few minute crystals. 



10. October the 5th. — A drop of rain from a brief shower left a distinct stain 

 in which were many crystalline forms, some cubic, some dagger-like, some 

 arborescent. 



11. October the 16th. — During the preceding twenty-four hours 2-07 inches of 

 rain; the wind still westerly; showers now (10 a.m.) of heavy drops. Some 

 drops collected left no stain. Five hours later, viz. at 3 p.m., the result was dif- 

 ferent ; drops equally large left a well-marked stain, in which were seen stellate 

 and dagger-like crystals. 



12. January the 26th, 1861. — During the twenty-four hours -20 inch of rain ; 

 the wind southerly, and unusually strong. A rain-drop left a distinct stain, in 

 which were some cubical and stellate crystals. 



13. June the 23d. — During the night '01 inch of rain, the wind N.E. and gentle; 

 this morning a slight shower of heavy drops. One collected left a distinct stain, 

 in which were visible two or three stellate crystals, one cubical, bluish, and many 

 granules. 



14. Juhj the 2d. — During the last twenty-four hours '19 inch of rain ; cloudy, 

 showery, the wind N.W. A drop of rain collected left a marginal stain, chiefly 

 granular. 



