Читать книгу Poisons, Their Effects and Detection - Alexander Wynter Blyth - Страница 42
ОглавлениеVinylamine.
Ethylamine.
Vinylamine.
Ethylamine.
§ 27. M. Ch. Michet[40] has investigated the comparative toxicity of the metals by experiments on fish, using species of Serranus, Crenolabrus, and Julius. The chloride of the metal was dissolved in water and diluted until just that strength was attained in which the fish would live 48 hours; this, when expressed in grammes per litre, he called “the limit of toxicity.”
[40] “De la Toxicité comparée des différents Métaux.” Note de M. Ch. Michet. Compt. Rend., t. xciii., 1881, p. 649.
The following is the main result of the inquiry, by which it will be seen that there was found no relation between “the limit of toxicity” and the atomic weight.
TABLE SHOWING THE RESULTS OF EXPERIMENTS ON FISH.
| No. of Experiments. | Metal. | Limit of Toxicity. | |
|---|---|---|---|
| 20. | Mercury, | ·00029 | |
| 7. | Copper, | ·0033 | |
| 20. | Zinc, | ·0084 | |
| 10. | Iron, | ·014 | |
| 7. | Cadmium, | ·017 | |
| 6. | Ammonium, | ·064 | |
| 7. | Potassium, | ·10 | |
| 10. | Nickel, | ·126 | |
| 9. | Cobalt, | ·126 | |
| 11. | Lithium, | ·3 | |
| 20. | Manganese | ·30 | |
| 6. | Barium, | ·78 | |
| 4. | Magnesium, | 1 | ·5 |
| 20. | Strontium, | 2 | ·2 |
| 5. | Calcium, | 2 | ·4 |
| 6. | Sodium, | 24 | ·17 |
