540 



Af författarne: 



NEGRI, a., Trionici eocenici ed oligocenici del Veneto. Napoli 1892. 



4:o. 

 — Nuove osservazioni sopra i trionici delle liguiti di Monteviale. 



Padova 1893. 4:o. 

 RüBERTS-AUSTEN, W. C, The rarer metals and their alloys. Wash. 



1898. 8:o. 

 Rogers, H. R., The universe, or the secrets of the sun and stars. 



Buffalo 1898. 8:o._ 

 ROSENBUSCH, H., Über Euktolith, ein neues Glied der theralithischen 



Effusiomagmen. Berl. 1899. 8:o. 

 ROTCH, A. L., The esploration of the free air by means of kites 



at Blue Hill observatory. Wash. 1898. 8:o. 



Stockholm 1899. Kungl. Boktryckeriet. 



