x\gricultural Research in New Hampshire 35 



2. A lightweight gasoline-powered drag saw of the wheelbarrow 

 type bucks 16" hard maple in one and one-half minutes. A small gar- 

 den tractor motor delivers power either to the saw or to the driving 

 wheel so that the machine is self-propelling. 



3. A home-made fuelwood saw for mounting on standard type 

 tractors runs on roller bearings. Belt tension can be altered by crank mo- 

 tion. The carriage feeds in a horizontal plane. 



4. Wheel and sled arches for logging have been observed. Trees 

 are felled and limbed, then twitched full length to yards or decks where 

 they are bucked with chain saws. Complete time studies are available on 

 these operations. 



5. Mechanically operated stakes on log trucks prove efficient in un- 

 loading and as a safety measure to prevent serious accidents. These are 

 in continuous operation and have been well liked by logging crews. 



6. Several types of log loaders using winches, booms, cable, tongs, 

 and dog are currently in use. These are mounted in various ways on 

 tractors, trucks, old power shovels, and pipe layers. Time and labor 

 saved are thought to exceed construction and operating costs. It is not 

 necessary to build log decks and landings where loaders are used. 



7. Other devices such as drop saws, conveyors, and hitches are also 

 under current observation. 



L, C. Swain 



y 



Reproduction Studies 



The routine measurements of growth and development have been 

 made for the recent plantations, and three new small ones established, two 

 coniferous and one deciduous. Inspection of the direct seeding plots 

 established last spring shows that one of the various treatments was suc- 

 cessful in repelling rodents. The sprout reproduction plots were not 

 measured in the fall of 1945. 



A few more species of tree seed were tested for quality during the 

 spring of 1946. Since 1945 was not a seed year, we were not able to get 

 the usual number of local species. 



C. L. Stevens 



White Pine Stands 



Two small thinning plots were made by students during the winter. 

 The usual records were kept to provide data for future analysis of results. 



C. L. Stevens 



Spruce Reproduction Studies 



The only thing accomplished has been the sowing of a seedbed of 

 White Spruce to provide seedlings for controlled condition experiments. 



C. L. Stevens 



