Letters XLIV, XLV, XLV, XLVI. To I. I. (Omitted)
LETTERS XLIV., XLV., XLVI. (XXXIX., XL., XLI.)
SPINOZA TO I. I. 2
XLIV. [Remarks on Descartes’ treatise on Optics.]
XLV. [Remarks on some alchemistic experiments, on the third and fourth meditations of Descartes, and on Optics.]
XLVI. [Remarks on Hydrostatics.]
