' B. S. 16229 - Platform pen in use. Platform covered with 
river sand. Pen shaded with rushes bound in place by two 
willows. Bear River Laboratory. Mouth of Bear River, Utah. 
August 6, 1915* 
B. S. 16234 - "Alkali boulevard" Bear River Field 
Laboratory and experimental pens for the study of 
duck diseases. Mouth of Bear River, Utah. 
August 9, 1915* 
