TTtTHTt^Tl-Hl i l'iilll fW" W 



KTtH^ fTH------f 



Calibration of Dipping Refractometer ^ 

 No. 5045 for Measurement of 

 Salinity of 5ea Water 



32 33 



Scale Reading 



103509—28. (Knee p. 13.) No. 1 



