Page 43, an excellent loboratory stand ==> an excellent laboratory stand
Page 47, Exe-pieces I, III. ==> Eye-pieces I, III.
Page 54, size like the I. b. ==> size like the Ib.
Page 59, stand with these accessoires ==> stand with these accessories
Page 61, the and of the tube ==> the end of the tube
Page 62, The fit inside ==> They fit inside
Page 64, The case consists ==> The base consists
Page 68, Aplantic triplets 64-68 ==> Aplanatic triplets 64-68
Page 69, Magnifikation, 20 diam. ==> Magnification, 20 diam.
Page 71, micrometric measurment ==> micrometric measurement