IV 



PAGE 



On the Hypertrophy of the. Interstitial Cells in the Testicle of the Guinea-Pig 

 under Different Experimental Conditions. By Alexander Lipschiitz, M.D., 

 Professor of Physiology (in collaboration with Benno Ottow, M.D., Charles 

 Wagner, Sc.D., and Felix Bormann). Communicated by F. H. A. Marshall, 

 F.R.S. (Plates 1 and 2) 132 



On the Irritability of the Fronds of Aspleniwm bulbiferum, with Special Reference 

 to Graviperception. By T. L. Prankerd, B.Sc, F.L.S. Lecturer in Botany, 

 University College, Reading. Communicated by Prof. W. M. Bayliss, F.R.S. 

 (Plate 3) 143 



No. B 651.— March 1, 1922. 



The Dia-HelioLropic Attitude of Leaves as determined by Transmitted Nervous 

 Excitation. By Sir Jagadis Chuuder Bose, F.R.S. , Director, Bose Institute, 

 Calcutta. Assisted by Satyendra Chandra Guha, M.Sc, Research Student, 

 Bose Institute, Calcutta 153 



The Ultra- Violet Absorption Spectra and the Optical Rotation of the Proteins of 

 Blood Sera. By S. Judd Lewis, D.Sc (Tubingen), B.Sc. (London), F.I.C. 

 Communicated by Prof. J. N. Collie, F.R.S 178 



The Colouring Matter of Red Roses. By Geoffrey Currey. Communicated by 



Prof. F. Keeble, FR.S .' 194 



The Kata-thermometer as a Measure of Ventilation. By Leonard Hill, F.R.S., 



H. M. Vernon and D. Hargood-Ash 198 



On the Heating and Cooling of the Body by Local Application of Heat and Cold. 

 By Leonard Hill, M.B., F.R.S., D. Hargood-Ash, B.Sc, and J. Argyll 

 Campbell, M.D 207 



On the Oxidation Processes of the Echinoderm Egg during Fertilisation. By 



C. Shearer, F.R.S 213 



The Depressor Nerve of the Rabbit. By B. B. Sarkar. Communicated by 



Sir E. Sharpey Schafer, F.R.S. (Plate 4) 230 



The Coagulation of Protein by Sunlight. By Elrid Gordon Young, Ramsay 



Memorial Fellow. Communicated by Prof. F. G. Hopkins, F.R.S 235 



No. B 652.— April 1, 1922. 



On the Development and Morphology of the Leaves of Palms. By Agnes 

 Arber, D.Sc, F.L.S., Keddey Fletcher- Warr Student of the University of 

 London. Communicated by Prof. F. W. Oliver, F.R.S 249 



Studies in the Fat Metabolism of the Timothy Grass Bacillus. By Marjory 

 Stephenson, Beit Memorial Research Fellow, and Margaret Dampier Whetham. 

 Communicated by Prof. F. G. Hopkins, F.R.S 262 



