The Preface.

Next j I didpurposely pass by divers Expert- *he hmtnts of other Writers that I had made Try all of rat io,

( and that mt without regiffringsome of their friglEvents') unless I could some way or other im - to hit

proie thrWy because J wanted leafure to insert (kynthem j and had thoughts of prosecuting the work ^orai

once begun of laying together those I had exa- i

mind by themselves in cafe of my not being pre - ' 3K

Vented by others diligence.So that there remains Num

not a little , among the things that are already *’cb,

published , to imploy those that have a mind VesS 1to exercise themselves in repeating and exa- * a filymining them. And I will not undertake, that ,none of the things deliver d, evn in this sonm,'J reatise , though never so faithfully set down , tre &;

may not prove to be thus farr of this Sort, AS to Relateafford the Curious somewhat to add about them. Ce fve

Tor I remember that I have somewhere in the a ' thTook i self acknowledged, that having written Buit bysnatches ,partly in the ( ounntrey,and partlyat unseasonable times of the year,when the want ,,of fit Instruments, and of a competent variety j, * .of flowers , salts, Pigments, and other mate' ertrials made me leave some of the following Ex- CUr ^

periments-, ( efpecialy those about Emphatical Jy f( olom s ) far more unffnifhdthan they shouldhave been, if it had been as case forme to 0u Asupply what was wanting to compleat them, ‘ y ’

as to discern. Thirdly to avoyd discourage d ff Jing theycung Gentleman I call Pyropbiliffywhorfl

tht