CHAPTER V. THE OBJECT OF MECHANICAL INDUSTRY.

Mechanical engineering, like every other business pursuit, is directed to the accumulation of wealth; and as the attainment¹ of any purpose is more surely achieved by keeping that purpose continually in view, there will be no harm, and perhaps considerable gain derived² by an apprentice³ considering at the beginning the main object to which his efforts will be directed after learning his profession or trade. So far as an abstract principle of motives⁴, the subject is of course unfit to consider in connection with engineering operations, or shop manipulation; but business objects have a practical application to be followed throughout the whole system of industrial pursuits, and are as proper to be considered in connection with machine-manufacturing as mechanical principles, or the functions and operation of machines.

The cost of production is an element that continually modifies or improves manufacturing processes, determines the success of every establishment, and must be considered continually in making drawings, patterns, forgings, and castings. Machines are constructed because of the difference between what they cost and what they sell for—between their manufacturing cost and market value when they are completed.

It seems hard to deprive engineering pursuits of the romance that is often attached to the business, and bring it down to a matter of commercial gain; but it is best to deal with facts, especially when such facts have an immediate⁵ bearing upon the general object in view. There is no intention in these remarks of disparaging⁶ the works of many noble men, who have given their means, their time, and sometimes their lives, to the advancement⁷ of the industrial arts, without hope or desire of any other reward than the satisfaction of having performed a duty; but we are dealing⁸ with facts, and no false colouring should prevent a learner from forming practical estimates of practical matters.

The following propositions will place this subject of aims and objects before the reader in the sense intended:—

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First. The main object of mechanical engineering is commercial gain—the profits derived from planning and constructing machinery⁹.

Second. The amount of gain so derived is as the difference between the cost of constructing machinery, and the market value of the machinery when completed.

Third. The difference between what it costs to plan and construct machinery and what it will sell for, is generally as the amount of engineering knowledge and skill brought to bear in the processes of production.

This last sentence brings the matter into a tangible¹⁰ form, and indicates what the subject of gain should have to do with what an apprentice learns of machine construction. Success in an engineering enterprise may be temporarily achieved by illegitimate means—such as misrepresentation of the capacity and quality of what is produced, the use of cheap or improper¹¹ material, or by copying the plans of others to avoid the expense of engineering service—but in the end the permanent success of an engineering business must rest upon the knowledge and skill that is connected with it.

By examining into the facts, an apprentice will find that all truly successful establishments have been founded and built upon the mechanical abilities of some person or persons whose skill formed a base upon which the business was reared, and that true skill is the element which must in the end lead to permanent success. The material and the labour which make up the first cost of machines are, taking an average of various classes, nearly equally divided; labour being in excess for the finer class of machinery, and the material in excess for the coarser kinds of work. The material is presumed to be purchased at the same rates by those of inferior skill as by those that are well skilled, so that the difference in the first, or manufacturing cost of machinery, is determined¹² mainly by skill.

Skill, in the sense employed here, consists not only in preparing plans and in various processes for converting and shaping material, but also in the general conduct of an establishment, including estimates, records, system, and so on, which will be noticed in their regular order. The amount of labour involved, and consequently the first cost of machinery, is in a large degree as the number of mechanical processes required, and the time consumed in each operation; to reduce the number of these processes or operations, shorten the time in which they may be performed, [27] and improve the quality of what is produced, is the business of the mechanical engineer. A careful study of shop operations or processes, including designing, draughting, moulding, forging, and fitting, is the secret of success in engineering practice, or in the management of manufactures. The advantages of an economical design, and the most carefully-prepared drawings, are easily neutralised and lost by careless or improper manipulation in the workshop; an incompetent¹³ manager may waste ten pounds in shop processes, while the commercial department of a work saves one pound by careful buying and selling.

This importance of shop processes in machine construction is generally realised by proprietors¹⁴, but not thoroughly¹⁵ understood in all of its bearings; an apprentice may notice the continual effort that is made to augment¹⁶ the production of engineering-works, which is the same thing as shortening the processes.

A machine may be mechanically correct, arranged with symmetry, true proportions, and proper movements; but if such a machine has not commercial value, and is not applicable to a useful purpose, it is as much a failure as though it were mechanically inoperative. In fact, this consideration of cost and commercial value must be continually present; and a mechanical education that has not furnished a true understanding of the relations between commercial cost and mechanical excellence¹⁷ will fall short of achieving the objects for which such an education is undertaken. By reasoning from such premises¹⁸ as have been laid down, an apprentice may form true standards by which to judge of plans and processes that he is brought in contact with, and the objects for which they are conducted.

(1.) To what general object are all pursuits directed?—(2.) What besides wealth may be objects in the practice of engineering pursuits?—(3.) Name some of the most common among the causes which reduce the cost of production.—(4.) Name five of the main elements which go to make up the cost of engineering products.—(5.) Why is commercial success generally a true test of the skill connected with engineering-works?

1 attainment   

n.达到，到达；［常pl.］成就，造诣

参考例句：

• We congratulated her upon her attainment to so great an age.我们祝贺她高寿。
• The attainment of the success is not easy.成功的取得并不容易。

2 derived   

vi.起源；由来；衍生；导出v.得到( derive的过去式和过去分词 )；（从…中）得到获得；源于；（从…中）提取

参考例句：

• Many English words are derived from Latin and Greek. 英语很多词源出于拉丁文和希腊文。 来自《简明英汉词典》
• He derived his enthusiasm for literature from his father. 他对文学的爱好是受他父亲的影响。 来自《简明英汉词典》

3 apprentice   

n.学徒，徒弟

参考例句：

• My son is an apprentice in a furniture maker's workshop.我的儿子在一家家具厂做学徒。
• The apprentice is not yet out of his time.这徒工还没有出徒。

4 motives   

n.动机，目的( motive的名词复数 )

参考例句：

• to impeach sb's motives 怀疑某人的动机
• His motives are unclear. 他的用意不明。

5 immediate   

adj.立即的；直接的，最接近的；紧靠的

参考例句：

• His immediate neighbours felt it their duty to call.他的近邻认为他们有责任去拜访。
• We declared ourselves for the immediate convocation of the meeting.我们主张立即召开这个会议。

6 disparaging   

adj.轻蔑的，毁谤的v.轻视( disparage的现在分词 )；贬低；批评；非难

参考例句：

• Halliday's comments grew daily more and more sparklingly disagreeable and disparaging. 一天天过去，哈里代的评论越来越肆无忌惮，越来越讨人嫌，越来越阴损了。 来自英汉文学 - 败坏赫德莱堡
• Even with favorable items they would usually add some disparaging comments. 即使对好消息，他们也往往要加上几句诋毁的评语。 来自互联网

7 advancement   

n.前进，促进，提升

参考例句：

• His new contribution to the advancement of physiology was well appreciated.他对生理学发展的新贡献获得高度赞赏。
• The aim of a university should be the advancement of learning.大学的目标应是促进学术。

8 dealing   

n.经商方法，待人态度

参考例句：

• This store has an excellent reputation for fair dealing.该商店因买卖公道而享有极高的声誉。
• His fair dealing earned our confidence.他的诚实的行为获得我们的信任。

9 machinery   

n.(总称)机械，机器；机构

参考例句：

• Has the machinery been put up ready for the broadcast?广播器材安装完毕了吗？
• Machinery ought to be well maintained all the time.机器应该随时注意维护。

10 tangible   

adj.有形的，可触摸的，确凿的，实际的

参考例句：

• The policy has not yet brought any tangible benefits.这项政策还没有带来任何实质性的好处。
• There is no tangible proof.没有确凿的证据。

11 improper   

adj.不适当的，不合适的，不正确的，不合礼仪的

参考例句：

• Short trousers are improper at a dance.舞会上穿短裤不成体统。
• Laughing and joking are improper at a funeral.葬礼时大笑和开玩笑是不合适的。

12 determined   

adj.坚定的；有决心的

参考例句：

• I have determined on going to Tibet after graduation.我已决定毕业后去西藏。
• He determined to view the rooms behind the office.他决定查看一下办公室后面的房间。

13 incompetent   

adj.无能力的，不能胜任的

参考例句：

• He is utterly incompetent at his job.他完全不能胜任他的工作。
• He is incompetent at working with his hands.他动手能力不行。

14 proprietors   

n.所有人，业主( proprietor的名词复数 )

参考例句：

• These little proprietors of businesses are lords indeed on their own ground. 这些小业主们，在他们自己的行当中，就是真正的至高无上的统治者。 来自英汉文学 - 嘉莉妹妹
• Many proprietors try to furnish their hotels with antiques. 许多经营者都想用古董装饰他们的酒店。 来自辞典例句

15 thoroughly   

adv.完全地，彻底地，十足地

参考例句：

• The soil must be thoroughly turned over before planting.一定要先把土地深翻一遍再下种。
• The soldiers have been thoroughly instructed in the care of their weapons.士兵们都系统地接受过保护武器的训练。

16 augment   

vt.(使)增大，增加，增长，扩张

参考例句：

• They hit upon another idea to augment their income.他们又想出一个增加收入的办法。
• The government's first concern was to augment the army and auxiliary forces.政府首先关心的是增强军队和辅助的力量。

17 excellence   

n.优秀，杰出，(pl.)优点，美德

参考例句：

• His art has reached a high degree of excellence.他的艺术已达到炉火纯青的地步。
• My performance is far below excellence.我的表演离优秀还差得远呢。

18 premises   

n.建筑物，房屋

参考例句：

• According to the rules,no alcohol can be consumed on the premises.按照规定，场内不准饮酒。
• All repairs are done on the premises and not put out.全部修缮都在家里进行，不用送到外面去做。