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Niepce de Saint Victor. Comptes Rendus, 45, 814 ; 46, 451, 490. 



Photography of the infra-red region of the solar spectrum. 

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Le fotografie del Sole fatte all'osservatorio df Meudon dal Professor 

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Tacchini (P.). tern. Spettr. ital., 9, 1-5. 



Photographie der weniger brechbaren Theile des Sonnenspectrums. 



Vogel (H. C.) und Lohse (O.). Ann. Phys. u. Chem., 159, 297 ; 160, 

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24, Pressure on the Sun. 



On a method of determining the pressure on the solar surface. 



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