SILK-WORMS. 
297 
tory calculated to contain five ounces of eggs only. 
The middle-sized laboratory (Table I. Fig. II.,) 
the only view that can be taken of the subject. Besides the 
proprietor must never forget that large laboratories are only 
intended to receive silk-worms that have been well reared 
and managed in small laboratories until the third moulting, 
or better still, to the fourth moulting.” M. Dandolo has no 
doubt that the failure of the large establishments has been 
caused by the silk -worms transported into the great labo- 
ratories not being originally healthy, and having been ill-ma- 
naged previously in the small laboratories. 
That all be done with order and expedition in the great 
laboratories, M. Dandolo divides them; into numbered sec- 
tions, which are called Laboratory , No. 1 ,*No. 2, No. 3, 
§c. §c. Each section is composed of a certain number of 
tables or wicker tray-stands of 150 or 200 feet square of 
surface, and must be attended by an active and intelligent 
manager, thoroughly practised in the business, and there 
should be a chief manager or overseer at the head of the 
great laboratory, who must also overlook the managers of 
the sections. On the wall near the door of each section 
there should be put up a board with the name of the manager 
of the individual section printed on it ; also the names of the 
assistants employed in it. A clock should point the hours 
for feeding the worms ; and a bell should warn the work- 
people when to bring in the leaves and food, and, in short, 
mark the usual course of operations. The proprietor or 
chief manager should now and then inspect the wickers, to 
ascertain whether the leaves have been well or equally dis- 
tributed, and if all the work has been done well and or- 
derly. “ Persons who have viewed my great laboratory 
(says M. Dandolo), may have convinced themselves that 
well understood good management animates the whole sys- 
tem, and preserves from every evil. 
The great laboratories or Dandolieres present the follow- 
ing advantages : 3 
1. A large laboratory for 20 ounces of eggs, will require 
one-third fewer persons to manage it, than will be wanted 
o 5 
