changes and modifications may be made therein without departing from the spirit of the invention or from the scope of the appended claims table ai __________________________________________________________________________attitude and azimuth of sun with resultant mirror angles at selectedspacings on june 22 at a meridian on the 30 u00b0 n latitude time h u03b8 sub s u03b8 sub az u03b8 sub m u03b4 u03b8 sub m u03b4 u03b8 sub m u03b8 sub m u03b4 u03b8 sub m__________________________________________________________________________5 20 am 100 u00b0 3 497852 u00b0 64 844362 50 269196 u00b0 77 35037 82 5961 3 9896 3 9896 3 98966 00 am 90 u00b0 11 476986 69 41079 46 279628 73 3608 78 60654 6 1947 6 1947 6 19477 00 am 75 u00b0 23 866416 75 697808 40 08491 67 16608 72 41182 6 3667 6 3667 6 36678 00 am 60 u00b0 36 59990 81 74400 33 71817 60 79934 66 0451 6 4661 6 4661 6 46619 00 am 45 u00b0 49 532082 88 20929 27 25208 54 3332 59 57899 6 4851 6 4851 6 485110 00 am 30 u00b0 62 50238 96 5435 20 76693 47 8481 53 09384 6 3016 6 3016 6 301611 00 am 15 u00b0 75 10551 112 5182 14 46536 41 5465 46 7922 4 1722 4 1722 4 172212 00 noon 0 83 45000 180 000 10 29312 37 3742 42 6200__________________________________________________________________________ design assumptions are rows of mirrors six inches wide focused on a six inch collector.