206 U. S. COAST AND GEODETIC SUKVEY. 



Table 14. — Factor f for middle of each calendar year, 1850 to 1999 — Continued, 



♦Factor / of MS, 2SM, and MSf are each equal to factor / of Ms. 

 Factor /of Pi, R2, Si, S2, S*, Ss, T2, Sa, and Ssa are each unity. 



