— XL — 

 rniing, and Wavorly Groupes, fournl in llie Colleclions of the Geo- 

 logica! Survey of Pennsylvania. — W. B. Scott and H. Fairfieìd 

 Oshorn. The M;imm.ilia of Ihe Unita Formation. 



* Transactions of tlie New York Aca(lem>/ of Sciences. - 



Voi. 9 - n. 1-2 - October-November 1889. 



* Transactions of the Royal Society of Edinbuìrjh. - Voi. 



35, p. 1-3 - Sess. 1887-88 et 1888-80. 



/. Aitken. 0\\ the-Nuinber of Dnst Particles in the Atmosphere. — 

 A. Geikie. The Histoiy of Volcanic Action during the Tertiary 

 Perici in the Britishs Isle. — C. Piazzi Smith. Mean Scottish 

 Meteorolo;,'y for the last Thirty-two Years — Eight Years' Obsér- 

 vations of the New Earlh Thermometers at the R. Observatory, 

 Edinburg, 1879-1888. — R. Kidston On Neuropteris plicata , 

 Sternberg, and Neuropteris rectinervis, Kidston, n. sp. — On 

 Ihe Tossii Plants from Teilia Quarry, Gwaengysgor near PresU- 

 lyn, Flintshite. — On the Fossil Flora of the Staffordshire CojI 

 Fields. — On the Fossils Plants in the Ravenhead CoUection in 

 the Free Library and Musoum, Liverpool. — H. M. Cadell. Ex- 

 periinental Researches in Mountain Building. — A. Melme. Hi- 

 stological Observations on the Muscular Fibre and Connective 

 Tissue of the Uteius during Pregnancy and the Puerperium. — 

 Cargill G. Kìiotl. On some Relations belveen Magnetisin and 

 Twist in Iion and Nickel 1. — TV. Dittmar. On the Behaviour 

 of the Hydrates and Carbonates of the Alcali-Metals, and ot Ba- 

 rium, al High Teniperaturos, and on the Properties of Lithia and 

 the Alo. Ilio Weigbt of Lithiuin. — G. Plarr On the Delermina- 

 tion of Ihe Curve, on otie of the Coordituile Planes, which fornis 

 the Outer Limit of the Positions of the Point jof Contact of an 

 EUipsoid of Revolution which always louches the Three Plnnes 

 of Reference. — G. Stewardson Brady. On Ostiacoda collecled 

 by H. B. Brady. Sea Islands. — Lelts and R. F. Blake. On Ben- 

 zil Phosphines and Iheir Detlvalives. — F. E. BeddarU. On the 

 Aiiatoiny, Ilistology, and Afiinities of Phreorcytes. — W. Turner. 

 On the Phicent.ition of Halicore Dugong. — C. N. Little. Non- 

 Alternate *$( Knots, of Orders Eight and Nine. ~ IV. C. M. On 

 the Development and Life Histories of the Teleostean Food-uiid 

 oiher Fislies. 



*Ti-(ins(ictions of the Wisconsin Aciidenu/ of Sciences, 

 Arf.\, and Letters. - Voi. TU - 1883-87. - Madison, 

 Wisconsin, 1889. 



^Vocfiho/ffrio deyli Acc<(deinici della (\-nsca. - V Impres- 

 sione. - Voi. VII iasc. 1. - Firenze, 1800. 



