148-152. I- Received from Hudson, Mass. 



II. Received from Coucord, Mass. 



III. Received from Fitchburg, Mass. 



IV. Received from Lexington, Mass. 

 V. Received from Amlierst, Mass. 



Per cent. 

 I. II. III. IV. V. 



Moisture at 100° C, 18.18 10.72 .47 7.20 10.65 



Potassium oxide, 7.36 6.16 4.16 5.90 6.47 



Pliosphoric acid, 1.02 1.66 1.28 1.66 1.40 



Insoluble matter, 5.43 * * 11.68 8.42 



153-157. I- Received from No. Hatfield, Mass. 

 II. Received from AVhately, Mass. 

 III. Received from So. Sudbur}', Mass. 



IV, V. Received from Mt. Lebanon, N. Y. 



Per cent 

 I. 



Moisture at 100 '^ C, 11.11 



Potassium oxide, 3.52 



Phosphoric acid, 1.44 



158-162. I, II, III, IV, V. Received from Concord, Mass. 



Per cent. 

 I. II. 



Moisture at 100° C, 



Potassium oxide, 



Phosphoric acid, 



Insoluble matter, 10.12 16.44 * 14.96 14.06 



163-167. I- Received from Amherst, Mass. 

 II. Received from Arlington, Mass. 

 in. Received from East Northfield, Mass. 



IV, V. Received from Ashland, Mass. 



Per cent. 

 I. II. III. 



Moisture at 100° C, 5-20 4.07 8.65 



Potassium oxide, 6.24 6.48 5.92 



Phos[)horic acid, 1.67 1.55 1.65 



*Not determined. 



