Ericsson, John, 1803-1889 · New York : Printed for the author at "The Nation" Press · leaf 634
Plate 12. See Chap. VI. PAl^ALLACTIc Mechanism fou mkasukixg tiik Lvtensity ok RadiXtio.v FROAI DiFFERKNT PaKTS OF THE SoLAR Dl-Si. Designed uv Joux Euicssux. Coxstkuctkd at New Yokk, 18T5. … Plats 13. See Cbap. VI. DiAdu.vM siiowiNd Tin: Attuactiox witiiix tiii-; Solai: MassAT I)iii-ki:i:n r Distaxcks viu>m its Ckntuk.
