8Berosus the Chaldean, was the inventor of the semicircle, hollowed in a square, and inclined according to the climate. Aristarchus the Samian, of the Scaphe or Hemisphere, as also of the discus on a plane. The Arachne was the invention of Eudoxus the astrologer, though some attribute it to Apollonius. The Plinthium or Lacunar, an example of which is to be seen in the Circus Flaminius, was invented by Scopas the Syracusan. The sort called Πρὸς τὰ ἱστορούμενα, by Parmenio. That called Πρὸς πᾶν κλίμα, by Theodosius and Andrias. The Pelicinon by Patrocles. The Cone by Dionysodorus. The Quiver by Apollonius. The persons above mentioned not only invented other sorts; but the inventions of others have come down to us, such as the Gonarche, the Engonatos, and the Antiboreus. Many also have left instructions for constructing the portable pendulous dial. When any one understands the formation of the analemma, he will be enabled, by reference to their writings, to suit them to any place. By the same writers have been discovered the method of making water dials.