MARLING OPERATIONS AT MARLBOURNE. 353 



more convenient, when removing the overlay by the plough and 

 scraper, to cut out as much beyond the outline of the designed un- 

 covering, as will give the slope of section recommended. 



During 1846 and 1847, the next ranges, E and F (Fig. II.), 

 respectively of 22 and 25 feet width, and each increased in length, 

 were ^ uncovered and excavated. The next range G- was 33 feet 

 wide 'throughout, and 428 feet long. The excavation of the marl 

 of Gr was begun in January 1847, and was not entirely completed 

 by October 1849. At that tim there had been uncovered another 

 still longer range, H, 36 feet wide and about 450 long, which was 

 nearly ready, and could be so as soon as required to begin the 

 excavation of the marl. This last uncovering had been in progress 

 more than a year, having been worked at when most convenient to 

 spare, or to apply the labour. In each of the ranges since D, the 

 upper end of the marl, for 50 feet in length, had been left to be 

 taken out with the next succeeding range, for greater facility in 

 carting. Therefore so much of the range G- still remains in the bed. 

 [1849.] All the ranges excavated, omitting the unfinished part of 

 Gr (and all of H) and including the work at another earlier digging, 

 have furnished the following quantities of marl, as estimated by 

 the heaps counted on the fields. 



Carried out in 1844, heaped bushels, 67,875 



" " 1845, " 75,512 



" 1846, 35,546 



1847, 42,575 



" 1848, " 55,106 



" 1849, " 56,169 



To Dec. 1850 ; (parts of range H.) 34,684 



Total . . . . . 367,466 



When my operations at this place ceased (December, 1850), there 

 then remained more than half of the marl of range H uncovered 

 and not excavated. 

 30* 



