Corrigenda. XV 



Corrigenda to Vol. I. 



Page 32, Fig. 50,199 B. A design is not registered. 

 120, No. 50,494. The Figure refers to No. 50,500, not 50,490. 

 .. 121, No. 50.502. The voltage limits for one circuit are 03 110 and 160 volts respectively, not 0.03. 



127, No. 50,534. This Sliding resistance is shown in fig. 50,534. 

 .. 133, No. 50,565. The price of the Gas Generator does not include motor drive, 

 ion Par 1 1 



14o! line 6 The remarks re the switching out of the compound winding are not valid and should be deleted. 



.. 142, line 5 and 6J 



144. last par. but one 1 The final remark g^ould read: ,,In this manner the given speed at full load can be in- 

 creased by about 15% at full load." The speed cannot be decreased. 

 14(>. last par. but three J 

 186, No. 51,074. The reference to W. D. relates to the 3^ Edition [and the 2nd Edition], for the fourth [and 



third] editions the following hold: W. D. 323 [305]. 

 190 192. Physical Apparatus for Projection. Pages 190 192 no longer hold and should be replaced 



by pp. 10941096. 



.. 1221. Special optical outfit with Steinheil Group antiplanet. Read = 1 : 6,5, not 1 : 4,5. 



1224, No. 9568. Biconcave lens costs 1. 0. 0, not 1. 5. 0. 



1228, No. 9656. Projection screen with electric device and with tilting device costs 31.15.0, not 25. 10.0. 



Corrigenda to Vols. II and III. 



Page 218, No. 51,361. Carbon Capsule costs 0. 1. 6, not 0. 1. 0. 



., 2>0, No. 51,413. Mohr's Burette with pinch cock, 100 ccm, costs 3 s. 6 d, not 4 S. 6 d. 

 .. 236, Nos. 51,569 and 51,570. The load which this balance may carry is expressed in kg. 

 ,, 259, No. 51,819. Engelmeyer's Kinegraph costs, constructed as stated, 5. 10. and not 3. 0. 0. A simple 



pattern for demonstrating the parallelogram of forces can be obtained for 3. 0. 0. 

 ,. 2(il. No. 51,830. 3 Balance Pans of 50 g each and 1 Set of Weights with one 100 g weight, two 50 g, and twelve 



10 g, suitable for the apparatus, cost 0. 15. extra. 



,. 273. No. 51,904. 27 Double Hook Weights are supplied instead of 26. 

 .. 279, No. 51,959. The large Whirling Table has a width of 32 cm, not 37 cm. 

 .. 279, Nos. 51,951 51,958. 1 Whirling Tables. These numbers and prices no longer apply, being replaced by the 



27!(. Xos. 51,961 51,968. / data given which is inserted between pp. 278 and 279. 

 .. 337, Nos. 52,465 and 52,466. The Hydraulic Press is equipped with a safety-valve for 20 atm., not 25. 

 ., 340, No. 52,485. The last note above Pellat's apparatus: "The piston is packed with mercury" is belonging 



to No. 52,483. 



363, Pig. 52,589. This figure refers to No. 52 689, not 52,589. 



.. 404, No. 53,058. Air reaction wheel. The figure of Fr. phys. Techn. is read: 3689, and not 2689. 

 .. 415. No. 53,171. The Wave Machine after Steindel is priced at 9.0.0 and not 6.0.0. 

 .. 4:w. No. 53,417- Tuning Forks with Electromagnetic Drive. The words: "By reducing the size of the orifice" 



should only come in after "pitch". 



488, No. 53,860. The addition to the optical disc gives only five cones of rays, not eight. 

 .. 532, Fig. 53,385. Read 54,385, not 53,385. 

 ,, 545, No. 54,529. The price of Classen's interference apparatus is to be understood without glass plates. The 



plates cost 1. 5. 0. 



809, No. 60,261. Sheet Iron Cube, and not Tube, is intended. 



',, 809, No. 60,266. 2 fixed Sounders, 2 solid and 2 hollow Spheres are supplied, not hollow cylinders. 

 860, Nos. 61,023 61,047. Thermopiles. "Hell's Dyaaphors" are no longer supplied. 

 865, Section 2. Leads and wires see vol. II, not vol. I. 



,, 968, No. 62,400 e. Universal Stand after Kolbe The words "with two glass walk" should be deleted. 

 ,, 980, Table. Induction Coils. The Figure No. 62,533 cited in type C applies only to the larger Induction 



Coils from size 8 upwards. The smaller coils have instead of the pachytrope a simple 



reversing switch tor double commutation. 



,. 982, No. 62,666. The Wehnelt Interrupter now costs 3. 15. 0, and not 3. 10. 0. 

 .. 1009, Fig. 62.078 H. Read 62.97811, not 62,078 H. 

 ,. 1010, No. 50,521. The Series Resistance can be used for 2 25 amps., not 5 24 amps. 



