492 KEPORT OF COMMISSIONER OF FISH AND FISHERIES. [26] 



ever, the special shovelers for any distances exceeding 3.6 meters, be as 

 follows, (8h being the number of shovelers required for the fish-pit): 



A=(^^+Sh + sh^ 



But as the flsh-pit runs parallel with the dike, and consequently the 

 line of the work has also to be run parallel with it, the number of 

 shovelers for each squad will be the same; and if F stands for the num- 

 ber of laborers required for the fish-pit, L for the portion of the dike 

 alongside of the fish-pit, a for the number of laborers per squad, and ^ 

 for the distance assigned to each squad, the formula will be : 



F=^ 

 I 



which foriiinhi will be needed, if, for special reasons, the fish-pit is to be 

 constructed after the main ditch and the dike, which, however, cannot 

 be recommended. In this case it should not be forgotten, in the first 

 calculation of the number of laborers (exclusive of the special shovelers 

 referred to several times), to omit the portion of the dike which is bor- 

 dered by the fish-pit. The fish-pit, and the portion of the dike belong- 

 ing to it, may also be calculated separately, as well as the rest of the 

 dike and the ditches belonging to it ; in this case the number of laborers 

 fouiul for each should be added, and in this way one would get the 

 number of laborers required for the entire dike and all the ditches. 



If it is intended to commence work along the entire line of the dike 

 with a certain given number of laborers, and to push the work to com- 

 I)letion iu all its i)arts, the length of a piece, l, should be ascertained, 

 whi(;h should be worked by one squad, according to the following 

 formula : 



, _ LA -f Sh + sh 



^- X 



and, accordingly, each squad should be assigned that length of ditch 

 which will furnish the necessary quantity of earth for the allotted length 

 of dike. 



In order to find the time in which, with the greatest possible or any 

 giv^en number of laborers, the dike can be constructed, all that is neces- 

 sary is to calculate the cubic contents of a portion of the ditch which 

 has been assigned to a squad, which will supply the demand of a cor- 

 responding piece of the dike, and to divide this by the cubic contents 

 of a piece of the ditch removed in an hour, or in a day, and the quotient 

 will be the number of working hours or days. 



In the example given as an illustration the most favorable case was 

 supposed, viz., that the main dit(5h, of equal length with the dike, wonld 

 sup])ly earth for tlie entire dike, that, therefore, the earth removed from 

 tiie povlion of tlie dit<-h iissigucd to each squad is equal to the cube of 



