(In favour of No. I.)

 Models tried. United Weights of Vessel and Load. Divisions in the Arms of Yoke when at 3 Miles per Hour. Divisions in the Arms of Yoke when at 6 miles per hour. Difference. Flat Vessel & Coaster. No. 1 and 2 192 lbs. each. No. 1, 48 No. 2, 52 4 Divisions = 1/12 No. 1, 50 No. 2, 50 None. ditto 256 " " 46 " 54 8 " = 1/6 " 50 " 50 None. ditto 320 " " 47 " 53 6 " = 1/8 " 49 1/2 " 50 1/2 1 Division = 2/99 ditto 392 " " 45 " 55 10 " = 1/5 " 49 " 51 2 " = 1/24 Flat Vessel & Schooner. No. 1 and 3 192 " No. 1, 45 No. 3, 55 10 " = 1/5 No. 1, 50 No. 3, 50 None. ditto 256 " " 43 " 57 14 " = 1/3 " 50 " 50 None. ditto 320 " " 44 " 56 12 " = 1/4 Uncertain. ditto 392 " " 45 " 55 10 " = 1/5 No. 1, 49 No. 3, 51 2 Divisions = 1/24 Flat Vessel& Twin ditto. No. 1 and 4 256 " No. 1, 50 No. 4, 50 None. Uncertain. ditto 320 " " 53 " 47 6 Divisions = 1/8 ditto ditto 392 " " 52 " 48 4 " = 1/12 ditto ditto "

## Table B. Experiments With Equal Arms Of The Yoke At 3 Miles Per Hour

 Models Compared. Depth of Immersion in Inches. Weight of Vessels with their Loads. Difference. Flat Vessel. No. 1 4.91 256 lbs. 32 lbs. No. 2 carries 1/8 more than No. 1. Coaster. No. 2 85 288 „ No. 1 6.083 320 „ 72 lbs. No. 2 carries 2/9 more than No. 1. No. 2 10.083 392 „ Flat Vessel. No. 1 4.17 192 „ 42 lbs. No. 3 carries 2/9 more than No. 1. Schooner. No. 3 8.41 234 „ No. 1 5.75 320 „ 42 lbs. No. 3 carries 2/15 more than No. 1. No. 8 10.25 362 „ Flat Vessel. No. 1 4.17 256 „ 0 No.3 difference at this rate of speed. Twin Vessel. No. 4 4. 256 „

N.B. The depth of immersion entered above is that observed when the vessels were at rest, and which did not appear to alter when in motion.

## Table C. Experiments With Equal Arms Of The Yoke At 6 Miles Per Hour

 Models Compared. Depth of Immersion in Inches. Weight of Vessels with their Loads. Difference. Flat Vessel. No. 1 4 2/12 192 lbs. The draught of water noted in the column of immersions was that observed when the models were at rest previous to the commencement of each experiment ; the actual immersion during the experiment was considerably less, especially in the flatter vessels; but there were no means of ascertaining it precisely. Coaster. No. 2 6 4/12 192 „ No. 1 4 11/12 256 „ No. 2 8 1/12 256 „ Flat Vessel. No. 1 4 2/12 192 „ Schooner. No. 3 7 9/12 192 „ No. 1 4 11/12 256 „ No. 3 9 2/12 256 „ Flat Vessel. No. 1 5 9/12 320 „ Twin Boat. No. 1 5 7/12 320 „