occAfions mi Adkefes made to His Majefty concerning the Ad- 
vancement of that Infiitution. 
And, for as much as the Accumulating into one Stock (which is the 
bufwefsofmyPhilofophicalCorrefyondencies, andthefe Tratfs) the 
Ingenuities of tnen^ and their various obfervations and Experiments 
concerning Nature and Art^ novo [catterd up and down in the 
Learned World^ may in time prove no [mall contribution to the in~ 
tended .Magazine of Materials for building hereafter a Mafculine 
and Ufeful Philofophjj I am apt to entertain my felf with the hopes, 
your Lord[hip will be fo far from resetting [uch Labours and Endea- 
vours at theje^ that you will be ready, with all vigour to quicken and 
further them. In the confidence of which, I here prefent your Lord- 
fbip witkthat^ though verj [lender, Philo[ophical Crop^ I have by 
my private Care and Induflry reaped the year lafl pa ft, thereby to 
manifefl in (ome meafure the Pa[sion I have both to contribute my 
Mite to the aforefaid Store- bwfe of Knowledge, and at the fame time 
toteft/fie, how much 1 am perfwaded, your Lord[hip will, incompli- 
ance with your Noble Genius, appear more and more a confiderable 
3enefa$or to, and Promoter of real and aftive knowledge, in 4 Na- 
tion efpetially^aboundingwith as many Able and Searching Mindsets 
any whatfoever, who cam and certainly will improve all [oris of 
commendable Sciences and Arts to the utmofi, when [upported by the 
Munificence of their Prince , and encouraged by the recomending 
Empr ? fitments of hk Chief Miniflers, among whom your Lor d[hip 
(lands in [o Eminent a place. Which confederation* My Lotd,hath : 
animated me to improve this occa [ton for making this humble repre- 
[mtment toyou, though at the fame time J fee ca*[etolbegyour parr 
don for it tohim^ who is , 
My Lord, 
Your.Lordftiips 
Very humble and obedient Servant 
Henry Oldenburg. 
Sec .Reg Seer* 
