THE AETIFIOIAL INCUBATION OF OVA. 



69 



with a small force-pump, the water can be forced up 

 g,gam into the cistern, and may he used again and 

 again. If, however, the house be one well furnished 

 yntla. water and large cisterns, a very small pipe tp 

 convey the water to the troughs or gutters, and an- 

 other to carry it off, will then be all that is necessary. 

 Of course, such an apparatus may be made as taste- 

 ful and appropriate to the place it is consigned to 

 as the owner may please. In the accompanying 



Fig. 1. 



cut (Fig. 1) engraving shows the lid of the upper 

 cistern (1) open; while (Fig. 2) has the cistern 



