556 



ARTIFICIAL ILLUMINATION 



light and there is the great Ijurden of caring for them. However, 

 on a farm or with a small flock their use may be profitable. For 

 the large commercial flock the electric illumination is far superior. 

 Gasoline lanterns have been tried extensively in the East and 

 have been found to possess serious deficiencies. The great amount 

 of labor involved is one serious drawback. The danger from fire 

 is an important matter which cannot be overlooked. The fact 



Fig. 237. — Another method of automatically operating: lights — Time clock and switch. 



that dust, which is so plentiful in the ordinary poultry house, 

 continually clogs up the air intake in spite of frequent cleaning, 

 is a serious setback to their efficiency. In order to operate the 

 electric lights automatically, expensive time switches are not nec- 

 essary. Many poultrymen are finding it economical and efficient 

 to accomplish the automatic turning on of the lights by using an 

 automatic alarm clock placed so that the winding key comes in 

 contact with a tumble switch. When the alarm goes off, the key 

 turns and pushes the switch over. 



