the area of the middle section is added, and this sum is multiplied by one-third of the distance between the cross sections. The product represents the contents of the room.

(b) If the deck mentioned in (a) over the engine-room deck is not the upper deck of the vessel the tonnage of the space between the deck mentioned and the upper deck (if not connected with the engine or is not used for entrance of light and air) will be found by multiplying together the length, breadth, and depth taken at the middle. The contents of this space will then be added to the contents of the other engine-room spaces. The same rule holds with regard to the contents of the permanent coal bunkers and other fuel compartments, which extend through two or more decks.

(c) If the engines, boilers, or the fuel bunkers are in separate compartments they will be separately measured in the manner prescribed in (a) and (b).

(d) To ascertain the contents of the space taken up by the shaft tunnel or tunnels of screw steamers, the mean lengths, breadths, and depths of the tunnel are multiplied together. If the tunnel has several divisions, each must be measured separately.

For measurement of closed-in and covered spaces on or above the upper deck, intended for admission of light and air to the engine room or for the actual working of the engine, the instructions in article 12, ship measurement ordinance, will apply.

(2) In using the Danube rule the following method controls:

(a) The tonnage of engine and boiler rooms, exclusive of coal space, is measured as follows: Measure the middle depth of the space between the under edge of the deck above the engine to the planking next to the keelson. At half height of the space three widths are measured, one at each end and one in the middle of the length. When necessary more than three widths are measured. The mean of the widths is then taken. The mean length of the space between the front and rear bulkheads is then taken, excluding, however, that part of the former which is not actually taken up by the engine and boilers or necessary to their working. The dimensions thus found, length, breadth, and depth, are multiplied together and the result is the cubical contents of the space under the deck above the engine room. If the deck mentioned is not the upper deck of the vessel, the volume of the space or spaces between the deck already measured and the upper deck (if not connected with the engine or used for the admission of light and air) are ascertained by taking the mean dimensions, length, breadth, and depth of each and multiplying them together. The total contents of these spaces will then be added to the other engine-room space. By upper deck in these instructions is meant the deck containing permanent superstructures capable of being closed in and extending from side to side across the entire breadth of the vessel. Spaces for admission of light and air, or for the actual working of the engine, are to be considered as properly to be deducted as part of the engine-room space only when they are under the upper deck (that is, the deck extending over the entire length and breadth of the vessel), or are contained in superstructures that may be closed in and which extend from side to side across the entire width of the vessel. If the engine and boilers are in separate compartments, the contents of each compartment will be ascertained according to the above rules and the sum of their contents taken as the contents of the entire space. In screw steamers the space occupied by the shaft-tunnel must be added to the engineroom space. The volume of this is obtained according to instructions in this paragraph under II 1d.

(b) The tonnage of coal bunkers is not measured, but in screw steamers is taken at 75 per cent and in paddle-wheel steamers at 50 per cent of the engine and boiler space, as found in (a). (3) The total deduction for engine, boiler, and coal-bunker spaces must not exceed half of gross tonnage of the ship, except in the case of steam tugs.

the

SEC. 4. The measurement certificate is made out according to article 24, paragraphs 3 and 4, of the ship measurement ordinance and the accompanying forms.1

SEC. 5. The fees for the application of the complete method and for making out the measurement certificate, including stamp costs, when the space under the tonnage deck does not require to be remeasured, are 24 pfennigs, for each cubic meter or fraction of gross capacity of

1 See Form 3, in Chapter IV, facing p. 54, for the English form of the Suez certificate. The German form is substantially similar.

the vessel. If under article 7, paragraph 2, a new measurement of the space under the tonnage deck is made 2 pfennigs for each cubic meter or fraction of the space under the tonnage deck must be added to the fees mentioned. Partial measurements due to repairs or a change in utilization of space, including making out a new measurement certificate, and stamp dues, are charged at 2 pfennigs for each cubic meter or fraction, whether the new calculation is based on actual measurement or on the acceptance of an earlier measurement. The minimum fees are 2 marks.

NOTE. For making out additional measurement certificates without previous measurement the dues are 2 marks, according to notice of July 19, 1890, Zentral-Blatt, German Empire, page 281.

SEC. 6. The contents of the measurement certificate according to article 29 of the ship measurement ordinance must be recorded in the record indicated. All notes relating to the measurements and calculations made must be preserved in the manner there shown. When a measurement certificate is made out a copy must be sent to the bureau of registry.

SEC. 7. In other respects the principles and provisions of the ship measurement ordinance and the accompanying instructions will also apply.

The methods prescribed in the last paragraph of article 18 and in paragraphs 6 to 9 of article 21, Instructions for Ship Measurement, will, at the request of the owner, not be applied in the measurement for passage through the Suez Canal. In place thereof the general method given in article 6 and paragraphs 4 to 6 of article 7, ship measurement ordinance, will be used.

APPENDIX XVI.

COMPARATIVE ANALYSIS OF THE PROVISIONS APPLY-
ING THE SUEZ RULES FOR THE MEASUREMENT
OF VESSELS BY FRENCH, ENGLISH, AND
GERMAN SURVEYORS.

COMPARATIVE ANALYSIS OF THE PROVISIONS APPLYING THE SUEZ RULES FOR THE MEASUREMENT OF VESSELS BY FRENCH, ENGLISH, AND GERMAN SURVEYORS.1

1 Translated in 1911 by Lieut. C. Garlington, C. E., from "Etude sur le Juageage," by V. Beret. Controleur-Adjoint de la Navigation de la Compagnie Universelle du Canal Maritime de Suez. Paris, 1905.

2 National rules of Germany now include all water-ballast tanks other than double bottoms in gross tonnage. In ascertaining net tonnage for German registry they are deducted if used solely for water ballast.