CONTENTS. Vll 



ARTICLE PAGE 



XX. — On a New Variety of Halloysite from Maidenpek, Servia. 



By H. E. Eoscoe, LL.D., F.K.S, President 213 



XXI. — On the Introduction of Coffee into Arabia. By 0. Schor- 



LEMMER, F.E.S 215 



XXII. — On the Equations and on some Properties of Projected 



Solids. By James Bottomley, B.A., D.Sc, F.C.S 218 



