Modified method for the determination of relative wave-lengths . :: ^- ^ ti O +j ** gU K/j 111 rt 5 rt OHO fO ^ >OVO t^ 00 On O M CI (H fO ^ lOVO CO d. KEY TO FIGS. 2 AND 3 iffcrencc Thcun iivered surf „„, , 3hiu ri lir fsSa Tor plate Hs!E3[£l?2^ (Similar 5a. Flat T^^ spring 0 8. Eyclc Lever pivoted

Size: 1132px × 2207px
Photo credit: © The Reading Room / Alamy / Afripics
License: Licensed
Model Released: No

Keywords: ., bookcentury1900, bookdecade1910, booksubjectspectra, bookyear1910