 Having coloured a card with a strong infusion of litmus, I passed a current of electric sparks along it, by means of two fine gold points, touching it at the distance of an inch from each other. The effect, as in other cases, depending on the smallness...  An Elementary Treatise on Natural Philosophy - Page 48by René Just Haüy - 1807Full view - About this book
 | Andrew Ure - 1821 - 512 pages
...the distance of an inch from each other. The effect, as in other cases, (upending on the smallncss of the quantity of water, was most discernible when...machine were sufficient to occasion a redness at the po•itive wire, very manifest to the naked eye. The negative wire being afterwards placed on the same... | |
 | 1823 - 872 pages
...the distance of an inch from each oiher. Tlie effect, as in other cases, depend ng on the emallnes' of the quantity of water, was most discernible when the card was nearly dry. In this stile a veiy ~ew turns of the machine were sufficient to occasion a redness -t the positive wire, very... | |
 | Andrew Ure - 1828 - 872 pages
...proved by it* effect on vegetable colours. Having coloured a card with a strong infusion of litmus, he passed a current of electric sparks along it, by means...when the card was nearly dry. In this state a very fe» turns of the machine were sufficient to occasion a redness at the positive wire, very manifest... | |
 | Encyclopaedia - 1845 - 876 pages
...following experiment upon vegetable colour, the uxiing power of positive electricity. A card being coloured with a strong infusion of litmus, I passed a current...naked eye. The negative wire being afterwards placed upon the same spot, soon restored it to its original blue colour.' Cavendish, Phil. Trans. 1784, 1785,... | |
 | 1922 - 736 pages
...power is finely shown by his eighth experiment, which he thus describes : " Having coloured a card with a strong infusion of litmus, I passed a current...manifest to the naked eye. The negative wire, being afterward placed on the same spot, soon restored it to its original blue colour." He verified in 1802... | |
 | 1922 - 734 pages
...power is finely shown by his eighth experiment, which he thus describes : " Having coloured a card with a strong infusion of litmus, I passed a current...manifest to the naked eye. The negative wire, being afterward placed on the same spot, soon restored it to its original blue colour." He verified in 1802... | |
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