Miscellaneous Intelligence. 79 
levels were executed by the use of the “ geodesic level,” a double 
line being run, not. simultaneously but forward and back over 
short spaces. The small difference between the two and the ver 
slow accumulation of error shows the great accuracy attainable 
with this instrument. discussion of the results shows a proba- 
previously published work on the “Secular Variation of the Mag- 
netic Declination in the United States and at some foreign sta- 
The constant demand for this paper renders necessary its 
frequent republication and it is so well known that more detailed 
mention of it need not here be made. Following this is a paper 
Alaska. It is accompanied by isogonic charts for the U.S. and. 
Alaska. The last chart of this character published by the Survey 
occupied. They represent twenty-six States and Territories, from 
Vermont to Florida and Wyoming, and also Canada an w 
Brunswick. Observations for declination were made at 141, for 
dip at 94, and for intensity at 93 stations. Full abstracts of the 
results are given and the values were used in the preparation of 
the isogonic charts of 1875°0 and of 1885-0. 
_ Hive papers devoted to the consideration of hydrographic ques- 
tions come next. these the most important is a “ Discussion 
of the tides of the Pacific Coast of the United States,” b 
