. Magazine des pâtes et papiers du Canada. rio est sous la paternité de H.G. Acres, B.A.Sc. dont le travail comme Engineerof hydraulique la Hydro-Electric Power Commission of long Ontarioha.s'est identifié comme une autorité sur le powerpossibilities de cette province. M. Acres clairement un<traite de manière exhaustive l withtlie possibilités individuelles qui composent près de ly-o.000.000 chevaux, capable de développement avec des capacités allant de 1000 à 5000 chevaux. Les bassins de ces rivières contiennent un compte-capable proportion de lac et marais et leur flowcharacteristics suseei^tible sont à

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. Pulp and paper magazine of Canada. rio is under the authorship of H.G. Acres, B.A.Sc. whose work as Hydraulic Engineerof the Hydro-Electric Power Commission of Ontarioha.s long identified him as an authority on the powerpossibilities of that Province. Mr. Acres clearly an<l comprehensively deals withtlie individual possibilities which go to make up near-ly o.000.000 horse-power capable of development with- ment of capacity ranging from 1000 to 5000 horsepower. The basins of these rivers contain a consider-able proportion of lake and marsh and their flowcharacteristics are suseei^tible to material improve-ment through the agency of artificial storage. Thereare a number of existing developments along the trib-utaries of the Ottawa of capacities ranging from 40 to100 horse power which are supplying power to localmarkets. One notable site of higher capacity is High Falls onthe Madawaska where the natural head can be in-creased to 150 feet and 12, 000 horse power developedunder natural flow conditions with probablj 20, 000. NIAGARA FALLS SHOWING DEVELOPMENT ON CANADIAN SIDE. in the jirovince. of which 702.000 horse power hasalready been develojjed. and in closing the author re-views the operations of the Hydro-Electric Power Com-mission and gives a synopsis of the regulations respect-ing water power in Ontario. In reviewing this treatise an endeavour has beenmade to cover briefly the more important facts and tothis end. all parts of the authors information has beenreproduced verbatim. From a hydi-aulic standiioint the more important ri-vers tributaiy to the Ottawa are the ^Mississipjii. theMadawaska. the Boniiechere. the Petewawa. and theMontreal, along which the gradient is generally steep, and concentrated natural heads ranging from 20 to 100feet offer numerous ojiportnnities for cheap develop- horse power under artificial storage. The Cobalt district is supplied by two plants; oneon the Metabitchewan operating under a 312 foot headwith 8, 000 horse power installed, a

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