524 SEC. 12. APPLIED MECHANICS. 



9. A ship may speedily be brought up by it, and ride with very short cable ; 

 the steadying power being at the crown end, it is of no object if the shank is 

 raised off the ground, which stocked anchors will not allow. 



10. In shallow water no damage can occur to a ship's bottom, as no part 

 of the anchor projects nbove ground. 



11. It is at least one-third shorter than ordinary anchors, therefore soon 

 clear of the water, and more convenient to manage. 



12. It can readily be disconnected, thus convenient to stow and easy to 

 transport in case of need, its heaviest part being less than one-third its total 

 weight. 



13. It is made without welding, thus of great soundness. 



14. It is worked with only one davit (being hoisted and let go by the fish 

 shackle), therefore considering the saving of first cost and future maintenance 

 of one davit and blocks, &c., it is by far the cheapest anchor to use, besides 

 greatest safety and simplicity in working. 



15. It is not dangerous when at " wash," for in the event of a collision, the 

 arms would simply be flattened to the ship's side instead of being driven in. 



16. Should the anchor be difficult or dangerous to weigh, from having got 

 fast in rock or wreckage, a runner with messenger attached may be slipped 

 down the cable to the crown end, and by this means the anchor can be drawn 

 put freely, as there are no barbs or palms to retard it. 



17. Being of such greater strength and holding power, and requiring less 

 cable than other anchors, shorter and stronger cables may be carried, thus 

 increasing the safety of the ship without additional weight or cost. 



2178ha. Tube connections (Boots' Patent) for Water 

 Tube Boilers, for use on land. The Patent Steam Boiler 

 Company, Birmingham. J. F. Flannery. 



2178hb. Full sized representations of the Tube 

 connections (Hoots' Patent) of the Water Tube Boilers, 



fitted in the screw steamer " Malta," of Liverpool, 1869. The 

 Patent Steam Boiler Company, Birmingham. J. F. Flannery. 



2178hc. Full sized representations of the Tube con- 

 nections (Roots' Patent) of the Water Tube Boilers, 



fitted in the Mersey ferry steamer " Birkenhead," 1872. The 

 Patent Steam Boiler Company, Birmingham. J. F. Flannery. 



2178hd. Drawings (7) representing Sections of Water 

 Tube Boilers, fitted by the Patent Steam Boiler Company, 

 Birmingham. J. F. Flannery. 



a. Ordinary water tube boiler on Roots' system. 



b. Sections and elevations (2) of the water tube boilers in the Mersey 



ferry steamer "Birkenhead." 



c. Water tube boilers fitted in the screw steamer " Montana." 



d. Elevation and section of the water tube boilers fitted in the screw 



steamer " Propantis." 



e. Sections of the water tube boilers of the steam flat " Gertrude." 



f. Drawings of Wigsell's patent water tube marine steam boilers. 



2178he. Models of a Water Tube Boiler and improved 

 Steam Engine. T. Moy. 



