s 
448 Miscellaneous Intelligence. 
was felt at Oakland ten miles east of the cit , but was not felt at Stock- 
ton, Sacramento, or Marysville. It was evidently confined to an area of 
ten or twelve miles. 
Up to this date, (Aug. 10th, 1859,) there have been but three shocks 
during the present year. 
2. Hruption of Mount Hood. (Extract from a private letter dated San 
most singular collection of clouds hovering over the summit, having a 
diat e , for mounting either dry or in balsam s 
in the substitution of chlorate of soda for the chlorate of potash employed 
according to Bailey’s method; and the whole process ma thus 
summed up. 1. (Say for guano) wash in water. 2. Boil in nitric acid. 
3. Pour off the acid from the sediment, add fresh acid, boil for fifteen 
minutes, pour in a little muriatic acid and boil for five minutes. 4. After 
complete washing out of the acids, carbonize the residue with strong sul- 
phuric acid; effect the combustion of the carbonized portion with —— 
_ of soda ; wash perfectly with water, and the diatoms need no further - 
treatment. 
‘Two thi 
