Archimedis Opera cum Apollonii Conicorum Libri IIII (1675) - Page 13

A decorative row of eleven stylized floral motifs is arranged horizontally across the top of the page.

For the sake of brevity, certain symbols are employed, the interpretation of which is appended here.

Symbol	Interpretation
A + B, that is	A and B taken together.
A — B,	A, with B removed.
A — : B,	The difference between A and B.
A $\times$ B,	A multiplied, or drawn into B.
$\frac{A}{B}$	A divided by B, or applied to B.
A = B,	A is equal to B.
A $\sqsupset$ B,	A is greater than B.
A $\sqsubset$ B,	A is less than B.
A.B :: C.D,	The ratio of A to B is the same as that of C to D.
A, B, C, D $\div\div$,	A, B, C, D are continuously proportional.
A.B $\sqsupset$ C.D,	The ratio of A to B is greater than that of C to D.
A.B $\sqsubset$ C.D,	The ratio of A to B is less than that of C to D.
A. B. $\dashv$ C. D = M. N.	The ratios of A to B and C to D compounded equal the ratio of M to N.
A. B. $\dashv$ C. D $\sqsupset$ M. N.	The ratios of A to B and C to D compounded exceed the ratio of M to N.
A. B. $\dashv$ C. D $\sqsubset$ M. N.	The ratios of A to B and C to D compounded fall short of the ratio of M to N.
Aq,	The square of A.
$\surd$ A,	The side, or square root of A.
Ac,	The cube of A.
$\surd$ Aq + Bq,	The side of the composite of Aq and Bq.

The Reader will grasp the remaining abbreviations, if any occur, by easy conjecture, especially if one is even slightly versed in analysis.