The persistence with which Germany continued yearly to build small protected cruisers eventually, however, began to cause some perturbation; and in the 1908–09 Estimates five protected cruisers of the _Bristol_ class were provided for. These were the _Bristol_ (Clydebank), _Glasgow_ (Fairfield), _Gloucester_ (Beardmore), _Liverpool_ (Vickers), _Newcastle_ (Elswick). The designed displacement was 4,820 tons, length 453 feet over all, beam 47 feet, and mean draught 15¼ feet. Armament two 6-inch, ten 4-inch, and two submerged tubes. A speed of 25 knots was expected from 22,000 horse-power. On trials all exceeded 26 knots. All were fitted with Yarrow boilers, also turbines of the Parsons type, except in the _Bristol_, in which Curtiss type turbines were installed. For 1909–10 four more similar ships were provided--the _Weymouth_ class. Displacement rose to 5,250 tons, and a uniform armament of eight 6-inch was substituted for the mixed armament of the _Bristol_ class. These four “Town” cruisers were the _Weymouth_ (Elswick), _Yarmouth_ (London and Glasgow Co.), _Dartmouth_ (Vickers), and _Falmouth_ (Beardmore). All were given Yarrow boilers and Parsons turbines except the _Weymouth_, which was supplied with Curtiss turbines. The Estimates of 1910–11 contained three cruisers, the _Chatham_, _Dublin_, and _Southampton_, of the same type, but with a displacement increased by 200 tons. Three more, the _Birmingham_, _Nottingham_, and _Lowestoft_, figured in the Estimates of 1911–12. In 1907 the practice was instituted of building a Scout or two a year, those constructed to date being the _Boadicea_, _Bellona_, _Blanche_, _Blonde_, _Active_, _Amphion_, and _Fearless_, all of which are unarmoured, and so more or less compelled to fight modern destroyers on equal terms. Of these the _Amphion_ was lost early in the war by a mine. Of the original type were three Australian cruisers, _Sydney_, _Melbourne_ and _Brisbane_, of which two were built in this country and the third built, or put together, in Australia. In all these ships the slight increase in displacement was due to the introduction of a thin armour belt amidships--a “reply” to a similar innovation in the German Navy. The 1912–13 Estimates saw no more of the “Town” class cruisers being provided for, but, as already stated, they heralded the appearance of eight vessels of a new type, officially described as “lightly armoured cruisers.” They were at one and the same time an entirely new type, and also a reversion to the original _Bristol_ with modifications born of experience. In essence, these ships of the _Arethusa_ class--_Arethusa_, _Aurora_, _Galatea_, _Inconstant_, _Royalist_, _Penelope_, _Phaeton_ and _Undaunted_, compared with the prototype as follows:--