Foreign Literature and Science. 169 



7., On the Iron in the Cruor or red part of the Blood.— 

 Englehart of Gottingen, from a series of experiments, con- 

 cludes, that the red color of the cruor of the blood is ow- 

 ing to iron, although this opinion has been controverted by 

 Brande, Vauquelin and others. He found, when the cruor 

 is deprived of its iron, that it becomes colourless. The iron 

 is separated from the cruor by means of chlorine, a method 

 much superior to those at present in use. — Ed. Phil. Jour. 



8. Manufacture of Paper from Marine Plants. — It is 

 said, that it has been tried with success in Holland, to man- 

 ufacture paper of marme algae. We have not seen this pa- 

 per, and are unable to say any thing, with certainty upon 

 the subject, but we entertain no doubts, regarding the suc- 

 cess of such an undertaking, provided it were conducted by 

 proper hands. The tenacious texture, and the nature of 

 these plants, seems to render them well adapted for this pur- 

 pose. — Ed. Phil. Jour. 



9. Manifacture of a Paper, which has the property of 

 removing Rust from articles of Iron and Steel. — After hav- 

 ing dried a certain quantity of pumice stone among live 

 coals, and reduced it to powder, grind it with linseed oil 

 varnish, and then dilute it with the same varnish, until it is 

 thin enough to be laid upon paper with a pencil. To give 

 this layer, a yellow, black, or brownish red color, the mass 

 is mixed, before applying it to the paper, with a httle ochre, 

 English red, or lamp black. Care must be taken to lay the 

 substance on as equally as possible, and to dry it in the ain 

 When the first coat thus applied to the paper is dry, anoth- 

 er is to be laid on in like manner. Those who manufacture 

 it for sale, pass the paper thus prepared under a cylinder, to 

 render it smooth. It is further to be observed, that the mass 

 must be liquid, and that it must be stirred about before ap- 

 plying it to the paper. — Ed. Phil. Jour. 



10. On the Poisoning of Plants. — Plants are liable (as 

 Carraderi has seen) to lose their power of contraction, by 

 the action of distilled oleander water ; thus this water, or 

 even better, the volatile oil of oleander, extinguishes all 

 the power of contraction of the capsule of momoidaca eln- 

 terium, and of halsamina impatiens. 



Vol. XV.— No. 1. 22 



