liberal use of natural phosphates, and in a long series of years
there might be a considerable money saving in depending at least in
part upon these rather than upon the higher priced dissolved
phosphates.'

"The director of the Maine State Experiment Station gives us the
following:

"'For the first year the largest increase of crop was produced by
soluble phosphate. For the second and third years without further
addition of fertilizers, better results were obtained from the plots
where stable manure and insoluble phosphates had been used.'

"The stable manure and insoluble phosphates here referred to were
not applied together, but on separate plots. In deed, the raw
phosphate was not used in connection with manure either in Maryland,
Rhode Island, Massachusetts, Maine, Pennsylvania, or Indiana; and in
the extensive experiments in progress in Illinois the raw phosphate
has been used, as a rule, not with farm manure, but with green
manures; and wherever manure has been used in connection with the
raw phosphate, as in Ohio, the comparison is made with the same
amounts of manure applied without phosphate.

"The Pennsylvania Report for 1895, page 210, contains the following
statement:

"'The yearly average for the twelve years gives us a gain per acre
of $2.83 from insoluble ground bone, $2.45 from insoluble South
Caroline rock, $1.61 from reverted phosphate, and 48 cents from
soluble phosphate, thus giving us considerably better results from