ERRATA.
Reading edition
On Page 7 (line 11) insert words "could be destroyed" after "anchor."
On Page 284, (Middle of page) "Fig. 176" should be "Fig. 168."
On Page 285 (4th line from bottom) "e" should be "d."
Reading edition
On Page 7 (line 11) insert words "could be destroyed" after "anchor."
On Page 284, (Middle of page) "Fig. 176" should be "Fig. 168."
On Page 285 (4th line from bottom) "e" should be "d."