[17] See 1 Note 2., +arbeitet ... aus+: works out, hollows out. [18] +der Betrag, um den+: the amount to the extent of which.... [19] +die Steigung oder Ganghöhe+: pitch. [20] See 2 Note 2. [21] +Stellschrauben+: set screws; stellen, to adjust. 17. [1] +verhalten sich umgekehrt+: they are to each other inversely. [2] +Bekannt+: well known. [3] +hierbei+: in this case (not _hereby_), Compare 13 Note 12. [4] +findet ... statt (stattfinden)+: takes place. [5] +bei Klingelzügen+: in bell-pulls. [6] +wobei+: in which; compare 13 Note 12. [7] +in der Regel+: as a rule. [8] +der Flaschenzug+: block and tackle. [9] +das Rad an der Welle+: wheel and axle. [10] +einem ... Seile+; see 1 Note 10. [11] +Riemen- und Seilscheiben+: pulleys for belts and ropes. 18. [1] +die Fortpflanzung+: propagation, transmission. [2] +einer ... Flüssigkeit+: of a liquid; see 1 Note 10. [3] +infolgedessen (in Folge dessen)+: in consequence of which. [4] +pflanzt sich ... fort (sich fortpflanzen)+: propagates itself. [5] +Ein ... Körper+: a body; see 1 Note 10. [6] +sogen. (sogenannte)+: so-called. [7] +Ist ... taucht+; see 1 Note 2 [8] +dabei+: in that case; compare 13 Note 12. [9] +gilt (gelten)+: holds true. [10] +eines ... Gefässes+: of a vessel; see 1 Note 10. [11] +die Druckhöhe+: head, column. 19. [1] +der Heber+: siphon. [2] +selbsttätig+: automatically. [3] +das Niveau+: level. [4] +zweischenkelig+: two-legged, two-armed; +der Schenkel+, thigh. [5] +dabei+: at the same time (not _thereby_). [6] +die Festigkeit+: strength (of materials). [7] +das Mass+: measure (do not confound with +die Masse+, mass). [8] +die Zugfestigkeit+: tensile strength. [9] +der Querschnitt+: cross-section. [10] +die Grösse+: magnitude, quantity. [11] +die rückwirkende Festigkeit+: compressive strength. [12] +die relative Festigkeit+: transverse strength. [13] +Grössen- und Formänderungen+: changes of size and form. The hyphen indicates that +änderungen+ belongs to +Grössen+ also. [14] +spröde+: brittle. [15] +zähe+: tough. [16] +dehnbar+: ductile. [17] +geschmeidig+: plastic, pliable. 20. [1] +die Gehörempfindung+: sensation of hearing. [2] +die Wellenbewegung+: wave motion. [3] +die Fortpflanzungsgeschwindigkeit+: velocity of propagation. [4] +das Fadentelephon+: string telephone (toy). [5] +Zwei ... Stücke+; see 1 Note 10. [6] +das Mittel+: medium. [7] +der Nachhall+: reverberation. [8] +vorwiegend+: preponderating; translate: mostly. [9] +Sind+; see 1 Note 2. [10] +Sinusschwingungen+: sine oscillations. [11] +hängt ... ab (abhängen)+: depends. [12] +stehend+: vertical. [13] +bei+; see 13 Note 12. [14] +der Grundton+: fundamental note. [15] +das Gepräge+: coinage = character. [16] +die Klangfarbe+: tone color = timbre. 21. [1] +selbstleuchtend+: self-luminous. [2] +lassen sich ungezwungen erklären+: may be explained in a natural (_lit._ unforced) way. [3] +das Mittel+: medium.