Around them were Hübner, Haak, Pell, Moriaen, Rulise, Hotton and Appelius, later to be joined by Sadler, Culpeper, Worsley, Boyle and Clodius.
It included Jeremy Collier, Dury, Thomas Horne, Marchamont Nedham, John Pell, William Rand, Christian Ravius, Israel Tonge, and Moses Wall.
In the period 1648–50 many works on education appeared from Circle authors (Dury, Dymock, Hall, Cyprian Kinner, Petty, George Snell, and Worsley).
[26] Individuals involved with the Hartlib Circle played an important role in Sweden's scientific revolution, as they travelled to consult on educational and religious reform, as well as tutored Swedish students who were sent abroad.
At a more studious level, Hartlib wanted academics to pool their knowledge so that the Office could act as a living and growing form of an encyclopedia, in which people could keep adding new information.
[38] Hartlib was noted as a follower of Francis Bacon and Comenius, but his background in the German academies of the period gave him a broad view of other methods and approaches, including those of Petrus Ramus, Bartholomäus Keckermann, and Jacobus Acontius.
[40] Boyle too attempted to straddle the opening divide between experimental chemistry and alchemy, by treating the latter in a less esoteric way; he did distance himself to an extent from the Hartlib group on moving to Oxford around 1655.
[41] Both Boyle and William Petty became more attached to a third or fourth loose association, the group around John Wilkins, at this period, now referred to as the Oxford Philosophical Club.