CONTENTS 



VOLUME B — G E N E E A L SCIENCE 



PAGE 



Introduction 17 



Effects of Fire — Staff Ohaiigcs — Private Workers — Title of l^aljoratories — Second Keview 

 Supplement — Volume B — Vai-iety of Subjects — Ornithology — Arachnida — Protozoology — 

 Ancient Gold Mining — Ethnology — Anthropology — Tropical Sanitary E)igineering — 

 Entomology — Chemistry — Soil Analyses — Calotropix jiroce)-(i -- Lilirary — distinguished 

 Visitors — Scientific Staff — Future of Scientific Work in the Sudan. 



Ueport of the Chemical Section. Ey William Beam 23 



Introduction — List of ^Vnalyses and Examinations — Scojie of ^\'(lrk. 



A Test for Hashish— Details of Test — Variations of Method. 



Khartoum Water-supply — Notes— Physical Characters— Tables of Analyses— Imjirove- 

 ment in Storage — Corrosion of Pipes — Action on Lead. 



Sobat River Water — Suitability for Irrigation Purposes — Tables of Analyses. 



ilECHANlCAL ANALYSIS OF Aeid Soils— Various Methods — Tables of Analyses— Centri- 

 fugal Method: Size of Clay Particles — Determination of the "Silt" — Clas.sitication of 

 Soil Particles— Resume of the Method Used. 



Soils of the Gezira— Native Crops— Rainfall— Classes of Soil— Exiicrimentul Farm- 

 Effect of Baking — Chemical Comjiosition — Tables of ilechanical Analyses — Tallies of 

 Chemical Analyses — Detailed Tables of Analyses. 



Gypsum as a Fertiliser for Sudan Soils — Lime in Soils — Fertiliser Exiierinients on 

 Cotton Soils — Effects of Application of Gypsum to Soils — Amount to be applied. 



Gum Research — ^licrobial Origin — Tapping Experiments — Influence of Cold — Method — 

 Varieties of Haxliah Gum — Viscosity — Tai)iiiiig of Talh Trees — Conclusions. 



Experiments on Gum Production in Kordofan. By E. S. Edie 73 



Investigations in Gum Gardens — Tables of Yields from Small Trees — Variations in Yields — 

 Effects of Rain — Sizes of "tears" — Tables of Yields from Large Trees — Maximum and 

 ilinimum Temperatures — Best Time for Tapping — Viscosity and Acidity of Gum from 

 Small and Large Trees — Methods of Determination — Effects of Treatment of llashah 

 Trees on the Yield : Effects of Strong Antiseptics ; Table of Results — Bacterial Origin of 

 Gum ; Transmission of Infection ; " In vitro " Experiments in Gum Production — Analysis 

 of Resulting Bacterial Products — Lalioratoi-y Confirmation of Work in Gum Garden. 



Preliminary Notes on the Ciiemistkv of the Latkx of Calotkopis puocera. By 



J. Thompson 85 



Native Uses of Ushar Plant — Investigations iin<l Mxiieriments — A Colour Reaction — Toxicity 

 of the Latex — Experiments with Rabbits — Toxic Portion — Detection in Cases of Suspected 

 Poisoning — Reactions of Foodstuffs — Reactions of Colour Reagents — General Analysis — 

 Extraction with Various Solvents. 



Report of the Entomolooical Skction. \\\ IIaiioi.h II. Kinc i)5 



Introduction — Itinerary— Control of liocusts Plant Diseases Ordinance - New Blood- 

 sucking Flies — Collectors — Control of .Mo.s(|uitoes — Injurious Piirds — Acknowledgments. 



Insects Injurious to Man and Animals — Mosc|uitoes- 'I'lic Control of .Mosquitoes — 

 Blood-sucking Flies other than .Mos(iuitoes : New 'rabaniil,-;, List with Localities: 

 Chlronomidd', Sinniliihi^, ]'xiirliiii(i(l(i\ Tdhiinidii', Mnxriiln. Ilijijidhoitriild' ('imirlijw — 

 (Eitridw — Ticks — Synoptic Table of Sudanese Ticks. 



