 Write with a solution of muriate of cobalt, and the writing, while dry, will not be perceptible ; but if held towards the fire, it will then gradually become visible ; and if the muriate of cobalt be made in the usual way, the letters will appear of an...  The Philosophy of Experimental Chemistry - الصفحة 156بواسطة James Cutbush - 1813 - عدد الصفحات: 694عرض كامل - لمحة عن هذا الكتاب
 | Samuel Parkes - 1807 - عدد الصفحات: 382
...muriate of cobalt be made in the usual way, the letters will appear of an elegant GREEN colour. 94. Write with acetate of cobalt, or with a muriate of...the paper a little, and the writing will be restored of a beautiful BLUE. 95. Draw a landscape with Indian ink, and paint the foliage of the vegetables... | |
 | Samuel Parkes - 1814 - عدد الصفحات: 584
...be made in the usual way, tlie letters will appear of an elegant GRliEN colour. See page 345. 102. Write with acetate of cobalt, or with a muriate of...little, and the writing will be restored to a beautiful bLUii. See notec, page 347. 103. Draw a landscape with Indian ink, and paint the foliage of the vegetables... | |
 | Samuel Parkes - 1816 - عدد الصفحات: 584
...cobalt be made in the usual way, the letters will appear of an elegant GREEN colour. See page 345. 102. Write with acetate of cobalt, or with a muriate of...the writing will be restored to a beautiful BLUE. See note i , page 347. 103. Draw a landscape with Indian ink, and paint the foliage of the vegetables... | |
 | Samuel Parkes - 1818 - عدد الصفحات: 616
...cobalt be made in the usual way, the letters will appear of an elegaut GREEN colour. See page 329. 141. Write with acetate of cobalt, or with a muriate of...previously purified from the iron which it generally containsj When the writing is become dry, these letters will also be invisible. Warm the paper a little,... | |
 | Hugo Reid - 1837 - عدد الصفحات: 402
...muriate of cobalt be made in the usual way, the letters will appear of an elegant green colour. 102. Write with acetate of cobalt, or with a muriate of...the writing will be restored to a beautiful blue. 103. Draw a landscape with Indian ink, and paint the foliage of the vegetables with muriate of cobalt,... | |
 | Practical chemist - 1844 - عدد الصفحات: 374
...muriate of cobalt be made in the usual way, the letters will appear of an elegant green colour. 3. Write with acetate of cobalt, or with a muriate of...the writing will be restored to a beautiful blue. 4. Draw a landscape with Indian ink, and paint the foliage of the vegetables with muriate of cobalt,... | |
 | Samuel Parkes - 1854 - عدد الصفحات: 232
...muriate of cobalt be made in the usual way, the letters will appear of an elegant green colour. 102. Write with acetate of cobalt, or with a muriate of...the writing will be restored to a beautiful blue. 108. Draw a landscape with Indian ink, and paint the foliage of the vegetables with muriate of cobalt,... | |
 | Ernest Spon - 1879 - عدد الصفحات: 478
...be made in the usual way, the letters will appear of an elegant green colour. 3. Write with acetate of cobalt previously purified from the iron which it generally contains. When the writing is dry, these letters will be invisible. Warm the paper a little, and the writing will be restored to... | |
 | 1883 - عدد الصفحات: 496
...be made in the usual way, the letters will appear of an elegint green colour. 3. Write with acetate of cobalt previously purified from the iron which it generally contains. When the writing is dry, these letters will be invisible. Warm the p;iper a little, and the writing will be restored to... | |
 | 1842 - عدد الصفحات: 446
...arising from different degrees ofoxidizement. Write with acetate of cohalt, or with a muriate of cohalt, previously purified from the iron which it generally...the writing will be restored to a beautiful blue, Put a little fresh calcined magnesia in a tea-cup upon the hearth, and suddenly pour over it as much... | |
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