3S8 ANNUAL RECORD OF SCIENCE AND INDUSTRY. 



not only the imported eggs, but those of domestic produc- 

 tion. Natural ice is used wherever it can be had ; other- 

 wise "machinery for its artificial production is made a part 

 of the preserving establishments. It is calculated that a 

 magazine of 100 square meters will comfortably accommo- 

 date 30,000 ounces of eggs, and a machine costing $2500 

 will, it is said, manufacture ice enough to keep the whole in 

 good condition. 13 B, Oct. 31, 1874, 337. 



PROFESSOR DUMAS AND THE PHYLLOXERA. 



Professor Dumas maintains that of all the remedies for 

 the Phylloxera, or grape-vine louse, the sulpho-carbonates, 

 especially that of j:>otash, are the only ones which are per- 

 fectly successful. This being strewed on the ground, the 

 next rain helps it to penetrate the soil, and the Phylloxera 

 is completely destroyed, as shown by experiments of Milne 

 Edwards, Pasteur, and others in different vine-growing dis- 

 tricts. 



It is understood that Professor Dumas does not intend to 

 claim the government reward of 100,000 francs for his dis- 

 covery, on account of his being u member of the commission 

 for testing the merit of different applications. He advises 

 that attention be still directed toward finding something 

 still better, or at least cheaper, as thereby likely to secure 

 the prize. 12 A, May 20, 54. 



PHYLLOXERA REMEDIES. 



Professor Dumas, to whom, we have already referred as 

 having strongly advised the use of the alkaline sulpho-car- 

 j bonates as a remedy against Phylloxera, has lately fur- 

 nished a second paper on the subject to the Academy of 

 Sciences in Paris. In this he reiterates his assertion that of 

 all the remedies against Phylloxera the sulpho-carbonates 

 are the most energetic, and that they merit in the highest 

 degree the attention of all persons interested in the recuper- 

 ation of the vineyards of France. He finds, as the result of 

 more recent experiments, that, although so deadly to the 

 Phylloxera, they render actual benefit to the vine, increas- 

 ing the activity of its growth. The principal difficulty here- 

 tofore has been that these sulpho-carbonates are not pro- 

 duced in a commercial way, and that consequently their 



