BAROMETRIC PRESSURES ON THE GREAT LAKES 



29 



The groups were studied separately as well as in combination with each 

 other as a single set of equations for one complete solution. 



TABLE No. 4 For Milwaukee, Unit 0.001 foot. 



EXAMPLE OF NORMAL EQUATIONS FOR BAROMETRIC 



EFFECTS. 



In each solution a set of normal equations was first formed for each month, 

 in the usual way, from the observation equations for that month. These 

 sets of normal equations were then available for separate study for each 

 month. 



