TY - JOUR T1 - An Extract of a Letter from Mr. Anthony Van Leeuwenhoeck, F. R. S. Dated October the 12th. 1713. Concerning the Fibres of the Muscles, &c. JF - Philosophical Transactions (1683-1775) VL - 29 SP - 55 EP - 58 PY - 1753/01/01/ UR - http://dx.doi.org/10.1098/rstl.1714.0007 M3 - doi:10.1098/rstl.1714.0007 AU - van Leeuwenhoeck, A. ER -