With a very fruitfull Præface made by M. I. Dee,
specifying the chiefe Mathematicall Sciẽces, what
they are, and wherunto commodious: where, also, are disclosed certaine new Secrets Mathematicall and Mechanicall, vntill these our daies, greatly missed.

Imprinted at London by Iohn Daye.
Transcriber’s Footnotes

[A.] Mathematical Notation. John Dee used the “root” sign √ in combination with some less familiar symbols:

“First power”, here used to express an unknown. Shown in this e-text as X (capitalized).
Root sign combined with “second power” symbol = square root. Shown in this e-text as 2√.
Root sign combined with “third power” symbol = cube root. Shown in this e-text as 3√.
Doubled “second power” symbol = 4th power; with root sign = fourth root. Shown in this e-text as 4√.

[B.] Diagrams: The symbol drawn as P (Pounds) is shown here as P. See above for X symbol.

HOTE
+C
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+
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+E
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MOIST A TEMPERATE B DRYE
+------+------+------+------+------+------+------+------+
|D
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COLD

_____________________
| | |
| {P}. 2. | Hote. 4. |
| | |
| {P}. 1. | Hote. 3. |
|_________|___________|

_____________________
| | | _
| {P}. 2. | Hote. 4. | ⅓ _ The forme_
| | | _ 3⅔ resulting.
| {P}. 1. | Hote. 3. | _ ⅔
|_________|___________|