Lower, 52. 



Outside, 55. 



„ 46. 

 „ 51. 



„ 46. 



„ 49. 



of the so-called Storm-glass. 105 



Jan. 3. Register, 37°. 



9.0 a.m. Upper, 441°. Lower, 43°. Outside, 43°. 

 Upper crust abundant, and numerous floating feathers just 

 below it. 



o 



Sun. 3.0 p.m. Upper, 54. 



Jan. 4. 9.30 a.m. „ 47. 



3.25 p.m. „ 52. 



Top crust still abundant ; thermometer bulb acting both as 

 nucleus and support. Rain; deposit softening down. 



Jan. 9. Register 32°. Top feathers very abundant, like an 

 inverted forest of pines ; completely covering the surface. 

 11.0 a.m. Lower, 44^. Upper, 42. Outside, 42. 

 Jan. 15. 



8-30 a.m. „ 411 n 38. „ 421 



3.22 p.m. „ 46. „ 46. ,, 47. 



The lower deposit heaped up towards window like a steep hill 

 hollowed out and covered with beautiful foliage. Fern -like 

 figures also projecting down from the top crust, but most abun- 

 dantly on the side nearest the window. 



All these various phenomena seem to be perfectly accounted 

 for by difference of temperature. In order to exaggerate these 

 differences, I attached to the side of the bottle nearest the win- 

 dow, about the middle, a black paper ring 1^ inch in outer 

 diameter, and i|ths of an inch inner diameter, so as to leave a 

 black ring fths of an inch wide. In putting on the ring the 

 bottle was disturbed a little, so that some of the top feathers fell 

 down, and turned over in doing so. The ring was just below 

 the summit of the deposit, and was quite invisible from the 

 room. In about an hour, however, that is, about 2 p.m., its dark 

 outline was quite evident, the heat absorbed by it having thinned 

 away the crystals. 



Jan. 16. 8.0 a.m. Ring quite concealed, the cold of night 

 having heaped up the lower deposit. 



2.0 p.m. Upper, 48°. Lower, 47°. Outside, 47°. 

 Form of ring distinctly visible. 



Jan. 20. 3.0 p.m. Upper, 59°. Lower, 56°. Outside, 53°. 

 Sun on window ; ring visible. 



6.40 p.m. Upper, 46°. Lower, 44J°. Outside, 45°. 

 Stars circulating in clear liquid. Hitherto the form of the 

 ring only visible. To-day a portion of the ring itself, about a 

 quadrant, on the side nearest the sunset laid bare. 



8.30 p.m. Upper, 42 p . Lower, 41J . Outside, 41°. 

 Much wind ; ring all concealed ; liquid turbid with stars from 

 the rapid cooling. 



