Director: S. T. Evans
Shows problem of building rigid brick and masonry houses on troublesome soils which swell and shrink due to seasonal wetting and drying. Soil identification gives the key to physical properties and bearing capacity of soils. These determine the correct foundation practice to prevent cracking and disfiguration. Intended primarily for architects and engineers.
The interesting habits and life cycle of a species of mutton-bird is the main subject of the film. Conservation studies and the industry are woven into the story. ... More »
The film shows some aspects of the entomologist's work in his attempts to control insect pests by the use of their natural enemies. ... More »
Experiments on dams and reservoirs to prevent evaporation. ... More »