682 



Index. 



Change of Length in Nickel Wires due to 

 Transverse Magnetic Fields Direct and 

 Alternating (Brown), 121. 



Change of Length in Nickel Wires of 

 Different Rigidities, due to Alternating 

 Magnetic Fields of Frequencies up to 

 150 per Second (I'.rown), 4) . 



Chemistry of Foul Mud Deposits (Letts 

 andEEA), 171. 



( 'oal- fields : An Analysis of the Palasozoic 

 Floor of North-East Ireland, with Pre- 

 dictions as to Concealed Coal Fields 

 (Wkight), 62!). 



Cole (G. A. J.). On the Mode of Occur- 

 rence and Origin of the Orbicular Granite 

 of Mullaghderg, Co. Donegal, 141. 



Collembola from Nyassaland, Two New 



. Species of (Carpenter), £43. 



Colucasia untiquorum, Exudation of Water 

 by (Flood), 506. 



Cows' Milk, Comparative Variation of the 



- Constituent Substances of (Siiekhy), 574. 



Economic Method of Determining 



the Average Percentage of Fat in a Cow's 

 Milk for a Lactation Period (Sheehy), 

 546. 



Possible Causes of Variation in the 



Quantity and Quality of (Sheehy), 585. 



Desoxy-Hydrocatechin-Tetramethyl-Ether 

 (Ryan and Walsh), 113. 



Determination of the Kate of Solution of 

 Atmospheric Nitrogen and Oxygen by 

 Water. Parts I and II (Adeney and 

 Becker), 385, 609. 



Determination of the Volatile Fatty Acids 

 by an Improved Distillation Method 

 (Reilly and Hickineottom), 513. 



Disease of Flax Seedlings caused by a 

 species of Colletotrichum, and trans- 

 mitted by Infected Seed (Pethybkedge 

 and Lafferty), 359. 



1 listillation, Brown's Formula for (Young), 

 663. 



Disease of Tomato and other Plants caused 

 by a New Species of Phytophthora 

 (Pethybrtdgb and Lafferty), 487. 



Dixon (Henry H.). Mahogany, and the 

 Recognition of some of the Different 

 Kinds by their Microscopic Character- 

 istics, 431. 



Award of the Boyle Medal to, 1916, 



179. . 



Dowling (John J.). An Apparatus for the 

 Production of High Static Voltages, 673. 



A New Form of very High Resis- 

 tance for use with Electrometers, 29. 



Dixon (Henry H.) and W. It. G. Atkins. 

 Osmotic Pressures in Plants. VI. — On 

 the Composition of the Sap in the Con- 

 ducting Tracts of Trees at Different 

 Levels and at Different Seasons of the 

 Year, 51. 



Doyle (Joseph). Observations on the Mor- 

 phology of Larix leptolejiis, 310. 



Electrical Resistance of Porcelain at Dif- 

 ferent Temperatures (Allen), 2S9. 



Electrolytes in the Leaf-sap of Syringa 

 vulgaris, On some Factors affecting the 

 Concentration of (Mason), 651. 



Electrometers, A New Form of very high 

 Resistance for Use with (Dowung), 29. 



Erinoid, Insulating Properties of (Allen), 

 331. 



Exudation of Water by Colocasia antiquo- 

 ruin (Flood), 506. 



Fatigue of Nickel and Iron Wires when 

 subjected to the Influence of Transverse 

 Alternating Magnetic Fields (Brown), 

 163. 



Flax Seedlings, A Disease of, caused by a 

 species of Colletotrichum, and trans- 

 mitted by Infected Seed (Pethybridge 

 and Lafferty), 35H. 



Flood (Margaret G.). Exudation of Water 

 by Colocasia antiquorum, 506. 



Further Observations on the Cause of the 

 Common Dry-Rot of the Potato Tuber 

 in the British Isles (Pethybridge and 

 Lafferty), 193. 



Gymnosomatous Pteropoda of the Coasts of 

 Ireland (Massy), 223. 



Hackett (F. E.). The Twist and Magnet- 

 ization of a Steel Tube in a Spiral 

 Magnetic Field, 415. 



Hackett (F. E.) and R. J. Feely. The 

 Polarisation of a Leclanche Cell, 279. 



Hydrocarbons of Beeswax (Ryan and 

 Dillon), 107. 



Insulating Properties of Erinoid (Allen), 

 331. 



