PORTABLE SUNDIALS 7 



work of V. S. (=Ulrichus Schmid) in the Miller collection at the 

 S. Kensington Museum. 



Ivory Portaria made at Nuremberg in the i6th and I7th centuries 

 closely resemble the small portable tablet dials of the Chinese. 



25. Tablet Dial and Compass and Wind Vane. 1614. 



Engraved Ivory, coloured. 



Size 3^ inches x 2^ inches. Lienhart Miller, 1614. 



Presented by Greville J. Chester, 1865-7, to the Ashmolean Museum. 



26. Tablet Dial and Compass. c. 1620. 



Size ij inches xi^ inches. . Ashmolean Museum. 



A much smaller instrument of the same kind with three dials only, 

 viz. horizontal and vertical dials with the same string gnomon and 

 a horizontal dial to show the Italian hours. 



27. Sundial and Compass. c. 1750. 



Brass, octagonal. Diameter 2 inches. No. 1913. 916, Ashmolean Museum. 



Johan Schretteger in Augsburg. 



The hour ring and pin gnomon are adjustable. There is a quadrant 

 for setting the hour ring for the latitude. This and the gnomon fold 

 flat over the face of the compass. 



28. Sundial and Compass. i7th cent. 



Gilt Brass, octagonal. Diameter 3 inches. Gunther Coll. 



With adjustable hour ring like the last but with small, folding plumet 

 in addition. 



The following latitudes are inscribed underneath the compass box : 

 Elev. Poli. Lisbon 39, Rom 42, Venedig 45, Wien. Augsp. 48, Numb 49, Prag 

 50, Warschau 52, Lubeck 53, Hambu 54, Riga 56, Moscau 57, Petersbu, 

 Stockholm 60. 



29. Oughtred's Double Horizontal Dial. 1632. 



St. John's College. 

 By E. Allen. 



The ' Horizontall Instrument' is engraved on the face of the plate 

 bearing the Circles of Proportion exhibited in the Mathematical Series. 



30. Dialling Sphere. c. 1700. 



Diameter lof inches ; height 14 inches. Orrery Coll. 3. 



I. Rowley fee. 



With a contemporary manuscript describing its use. 



CHILINDRES OR PILLAR DIALS 



The Chilindre or Pillar Dial has been derived from an ingeniously 

 contrived dial of which the origin is to be sought among the Mediter- 



