370 



Scientific Intelligence. 



xix. p. 425. M. Welter observes, that in the combustions which he has 

 mentioned, that of carbon deviates most from the law, whereas by Des- 

 pretz's experiments, it is the one which deviates the least. — See Ann. de 

 Chim. torn, xxvii. p. 223. 





17. On the Colouring Matter, called Chica, by the Indians. — The chlca, 

 with which the Indians of Rio Meta and the Orinoco paint their bodies 

 red, is obtained by boiling the leaves of the Bignonia Chica for a long time 

 in water. The red feculent matter is quickly precipitated by adding some 

 pieces of the bark of a tree which is common in the savannahs of Meta, 

 and is called arayana. The red matter is then carefully washed, and be- 

 fore drying, it is put up in round cakes, from five to six inches in diame- 

 ter, and from two to three high ; in which form it is met with in com- 

 mon. M. Boussingault remarks, that they have begun to employ chica in 

 dyeing. When fixed in cotton, it gives it a yellow orange colour. — See 

 Ann. de Chim. torn, xxvii. p. 315. 



IS. 



Avogadru's Table of the Affinities of Bodies for Caloric. 



Mcmoric della Rcalc Acadcmia dc Torino, torn, xxviii. p. 68. 



19. Aeogadro's Table of the Neutralizing Powers of different Substances. 

 — In the following table, the acidifying or acid neutralizing powers, are 

 marked with the sign — ; and their alkalinity, or neutralizing alkaline 

 power, by the sign + . 



