PORTLAND STONE

is a fine compact oolite, so named from the island where it is quarried. It is a convenient but not a durable building-stone. POTATO ( Pomme de terre , Fr.; Kartoffel , Germ.); is the well-known root of the Solanum tuberosum . The following Table exhibits several good analyses of the potato :— | Sort. | Fibrine. | Starch. | Veg. album. | Gum. | Acids and Salts. | Water. | Analyst. | | Red potatos | 7 | ·0 | 15 | ·0 | 1 | ·4 | 4 | ·1 | 5 | ·1 | 75 | ·0 | Einhof. | | Id. germinated | 6 | ·8 | 15 | ·2 | 1 | ·3 | 3 | ·7 | — | 73 | ·0 | — | | Potato sprouts | 2 | ·8 | 0 | ·4 | 0 | ·4 | 3 | ·3 | — | 93 | ·0 | — | | Kidney potatos | 8 | ·8 | 9 | ·1 | 0 | ·8 | — | — | 81 | ·3 | — | | Large red do. | 6 | ·0 | 12 | ·9 | 0 | ·7 | — | — | 78 | ·0 | — | | Sweet do. | 8 | ·2 | 15 | ·1 | 0 | ·8 | — | — | 74 | ·3 | — | | Potato of Peru | 5 | ·2 | 15 | ·0 | 1 | ·9 | 1 | ·9 | 76 | ·0 | Lampad. | | Potato of England | 6 | ·8 | 12 | ·9 | 1 | ·1 | 1 | ·7 | 77 | ·5 | — | | Onion potato | 8 | ·4 | 18 | ·7 | 0 | ·9 | 1 | ·7 | 70 | ·3 | — | | Onion Voigtland | 7 | ·1 | 15 | ·4 | 1 | ·2 | 2 | ·0 | 74 | ·3 | — | | Onion cultivated in the environs of Paris | 6 | ·79 | 13 | ·3 | 0 | ·92 | 3 | ·3 | 1 | ·4 | 73 | ·12 | Henry. |