Aldershot Camp. 



0'005 ; and dissolved by water saturated with car- 

 bonic acid in forty-eight hours, for soil, 0'030 ; 

 subsoil, 0-018. 



Acreage, 

 Population, &o. 



The total area of the farm is 

 138'5 acres, and of this 120'5 

 acres are available for sewage 



regard to the treatment of " new land " will ap- 

 pear hereafter. Cropping. — The main crop is 

 Italian rye-grass, cabbages and mangold wurzels 

 are also grown, there are 2 roods of osiers and some 

 rhubarb beds. The produce of the farm is largely 

 used to feed milch kine, of which some forty-eight 

 are generally kept — they do not leave the stalls 



treatment. The available area under irrigation at until they are " out-of-profit." 



one time is 40 acres; the population served is 

 20,000, which works out at 166 persons per 

 irrigable acre, or 498 persons per acre for the 

 average area irrigated. The normal dry-weather 

 flow is 50 gallons per head per diem. The amount 

 treated per acre for twenty-four hours at the normal 

 rate of flow is 24,900 gallons on the average area 

 irrigated, equal to 8,300 gallons on the whole irri- 

 gable area. 



Treatment 

 and Cropping. 



Treatment. — The sewage flows 

 in main carriers (pipe, half-pipe, 

 and earthen plough - formed) 

 along the highest sides of the plots, and is dis- 

 tributed by contour grips or channels. These are 

 50 ft. to 60 ft. apart, are diverted sufficiently from 

 the true contour line to give the required fall and 

 run out before the further side of the plot is 

 reached. It should be noted that the men under 

 Col. Jones's supervision have been, and are, from 

 time to time employed in improving the surface 

 levels, the object in view being to pass the sewage 

 in a thin stream over the land. Some notes with 



The sewage is screened while 



„ __, ^ very fresh, and some settlement 



Sewage, Effluent "^ . ,, , , n, ■ ■, 

 and Stream occurs m the tanks. Consider- 

 able evaporation takes place, 

 especially in summer. The chief Chemical results 

 are given on following page. 



" All the effluents were more or less yellow or 

 brown in colour (but those tested for this point 

 were colourless or light yellow when filtered), and 

 they contained very decided amounts of red-brown 

 flocculent suspended solids — i.e., fragments of weed 

 coated with red oxide of iron, washed from the 

 drains. These solids are, however, extremely light. 

 . . . Excepting No. 56 (a bad sample, drawn 

 in part from land which was undrained and not 

 levelled) and No. 90 [not analysed], both of which 

 had a putrefactive smell, and No. 247, which had 

 a suspicious smell, but was nevertheless a good 

 effluent, all the samples had either a clean earthy 

 or a fishy - earthy smell when they came to be 

 analysed; a few of them, however, were noted as 

 having more or less of a sewage smell when drawn. 

 One or two had an alkaline reaction, but the 



13 



