A method is given for the calculation of the area of animal accommodation needed to produce a given output of small laboratory animals. This method depends on determining the number of cages needed according to productivity, the age of animals at time of use, the proportion of animals not suitable for use, and the stocking density of the growing stock for the output needed. The area needed to hold this number of cages can then be calculated according to the shelf length taken by the cages, working space required, numbers of tiers of cages, and the proportion of animals that will be wasted due to fluctuations in supply and demand. An example is given and compared with actual results, and the effects of errors in the estimation of some of the variables are discussed.

The Crooked River Forest, a unit managed by the government of British Columbia, is typical of the eight other units which surround Prince George. Many professionals are involved in the progressive development of the forest. Socially foresters share concern with others for a native population, for the welfare of the numerous employees of an active woods industry, and for the growing use of forest and waterways for recreation. Numerous pressures of rights-of-way, industrial sites, and parks, indicate a growing necessity to keep tight rein on tendencies to prodigality in converting forest acreage to other purpose. Departmental organization of the provincial government allows a high degree of liaison and co-operation between branches, and there is a satisfactory basis to develop intelligent land use.

The opportunity to grow vegetables in a weed free environment has become a reality in the last decade and offers one of the greatest advances to be made in vegetable growing, yet this knowledge has not been exploited by the industry, probably due to lack of demonstration and extension. Traditional techniques of growing have relied on inter row cultivation as a means of weed control and for this reason vegetables are grown in rows considerable distances apart. This allows the passage of cultivation equipment but also encourages establishment and development of weeds in a competition free environment.