TECHNOLOGY. 



995 



pilation of 845 analyses made l)y the Division of Chemistry, and in 

 various parts of the country, accompanied by statements regarding 

 the interpretation of the atialytical results and a description of the ])est 

 methods now in use for the analysis of wines. Attention is called to 

 the fact "that these anah'ses are not to be accepted in any way as 

 expressing the (quality of the American wines produced to-day by the 

 competent wine makers in wineries conducted in accordance with the 

 latest scientific principles of fermentation and ripening." The com- 

 pilation is intended to be merel}' introductory" to careful chemical 

 studies of *'all the tj^pical American wines and their chief character- 

 istics," which it is proposed to take up at once. 



Report on the vrines made from grapes gro-wn on alkaline soils 

 of Algeria, L. Roos, E. Rousseaux, and J. Dugast {A/ui. >Sci. Ayroii., 

 1900, //, No.s, 2,2yp- 276-320; 3, pp. 321-337).— ThQ^nthov concludes 

 from an extensive series of observations that vines growing on alkaline 

 soils ma}' produce grapes containing a high percentage of chlorid 

 without showing any symptoms of injury themselves. Different inves- 

 tigators have maintained that < >. 2 to ( ». 3.5 gm. of sodium chlorid per liter is 

 the maximum content for normal wine, l)ut the author has observed 

 much larger proportions of the chlorid without any accompanying 

 injury to the vines. There was no constant relation between the pro- 

 portion of chlorids in the wine and in the soil on which the grapes 

 were grown, nor between the chlorin and the other constituents of the 

 wine. The amounts of the various saline substances in the grapes 

 seemed to be determined very largely by the climatic conditions, vigor 

 of growth of the vines, etc. The author is of the opinion that the 

 salts are contained mainly in the seeds. 



Wattle barks for tanning, J. H. Barber {California Sfa. Rpt. 

 1898^ pp. 227-230). — This article gives measurements of typical trees, 

 tannin content of the bark of stems, branches, and large roots, and 

 practical tanning tests of the bark of tanbark acacias {A. 2^!/cmwt/ta, 

 A. (lecuj'rens, and A. mollissima), planted at the forestry station at 

 Santa Monica. The results of the tanning determinations are given in 

 the following table: 



Iktcrmi nations, of hmnbuj imiteriol rn black mid aoldi'ti vattles. 



