AGRICULTURAL MACHINERY 



1507 



Fraction 



of cost new charged 



off annually 



All 



One-half . , 

 One-third . 

 One-fourth . 

 One fiflh . . 

 One-sixth . . 

 One- seventh. 



Average 

 investment 



(par cent 

 of first cost) 



% 

 100.00 

 75.00 

 66.66 

 62.50 

 60.00 

 58.33 

 57-14 



Fraction 



of cost new charged 



off annually 



One-eighth . 

 One-ninth . 

 One-tenth . 

 One-eleventh 

 One-twtlfth 

 One-thirteenth 

 One fourteenth 



Average 

 investment 



(per cent 

 of first cost) 



% 

 56.25 

 55.55 

 55-00 

 54-54 

 54-17 

 53.84 

 53-57 



Fraction 



Averse 

 investment 



of cost new charged 



(per cent 



off annually ^f fi^st cost) 



One fifteenth 

 One-sixteenth 

 One- seventeenth 

 One eighteenth 

 One-nineteenth 

 One-twentieth . 



% 

 53-33 

 53-12 



52.93 

 52.77 

 52.63 



52.50 



by dmding the service in acres by the normal acreage or day's work done by 

 the machines. 



Cost of Repairs. — Where ordinary care is used by the operator, the 

 repair charges should make up bnt a small proportion of the total cost. 



Relation of Annual Repairs to First Cost. — The writer gives the type of 

 implement, the annual cost for repairs calculated as per centage of the first 

 cost, and the average present value of the equipment. The percentage 

 varied from 1.2 to 5.8 except for the v/alking plough for which the per- 

 centage was over 20.5. 



Shelter. — There are no data available on the relative hfe of machinerv' 

 when housed and when not housed. Farmers allow 20 per cent of the first 

 cost cf the machine in cases where special shelter is necessary. 



Relation of M-achinery Cost to Total Cost of Farm Operations. — The writer 

 takes account of man-time and horse-time. One man is able to manage all 

 the implements except the cabbage transplanter which requires three men. 

 The machine cost of the different operations does not exceed 50 per cent of 

 the whole: ranging from 4.7 per cent for the walking plough to 42.8 per cent 

 ior the grain binder. 



Conclusion. — The data collected by the writer should help agricitl- 

 turists to determine the probable length of service for the various imple- 

 ments, the normal cost of repairs, and, allowing for the size of their hold- 

 ings, to decide whether to buy or hire farm machinery. 



nil - Maillet Motor Cultivator with Controlled Rotary Blades. — fremiel, victor, in Le 



Genie rural, 8th year, No. 62, Xew .Scries, No. 2 ot 191?-., pp. 9-1 (, Paris, jnly, 1916. 



This invention is a distinct advance on the 2 or 3 speed motors of the 

 usual American pattern. In practice the 2 or 3 speeds are unsatisfactory 

 and often difficult to operate, whether by shifting the blades on their axle 

 or by changing the speed of rotation ; this latter method leads to objection- 

 able compHcation in the gear-box. In order to avoid these difficulties the 

 inventor has combined the speed of rotation with the travelHng speed. 

 He has designed a ploughing mechanism, illustrated in Fig. 2, which consists 



